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Best Cordless Phone 2019 • 0 Cordless Phones Reviews

What is a cordless phone?

What is a cordless phone test and comparison?The cordless phone is a landline phone with handset. The telephone itself is connected to the base station in the apartment via radio waves. When telephoning, users therefore have a certain radius of movement. The cordless telephones from the Test 2019 are mainly used for private purposes, while a telephone system with cable is usually used at the office workstation.

The cordless telephone refers with its name to the direct translation of the English term cordless telephone. The abbreviation CT is found in the earlier standards CT1 and CT2. CT1 were cordless phones with 80 analog duplex channels and 25 kHz frequency spacing between channels. CT2 had 40 digital duplex channels. In the meantime, these outdated standards have become obsolete; instead, today's cordless phones comply with the DECT standard.

The cordless phones from the test combine the proven functions of landline telephony with modern technology. For telephone subscribers, this means that the connection is secure as long as they are within range. The telephone socket itself is coupled to the fixed network, whereby the base station often functions simultaneously as charger. In some cases, the cordless phones from the comparison test are also available as individual handsets that are purchased in addition to the existing base station.

Advantages & Application areas

The main advantage of the cordless phone is its great flexibility. You can leave the room where the base station is located and walk around the apartment. Often the range even extends into the garden or into the cellar. Users do not have to carry a cable that could become a trip hazard for other people, but they can engage in a variety of activities and move around freely when telephoning.

Cordless phone test - the reliable phone connectionThe modern functions of the current cordless phones from Test 2018 offer users the possibility to record calls, respond to a call waiting or activate a forwarding. Even if you're not always at home, you don't miss a call this way. With the reliable telephone connection, which does not require a cable, the cordless phones are particularly suitable for home use. The cord is not in the way and you don't have to disturb the other roommates when a call comes in. You simply take the handset and go to another area of the house to make calls in peace. So the privacy is preserved for all. The good radio transmission ensures interference-free voice quality. Over the decades, the technology has been continually optimized, as can be seen from the refined standards. Whether you're sitting on the terrace drinking coffee, in the kitchen or picking up your laundry from the basement, the cordless phone is there to provide a secure telephone connection.

A cordless telephone from the Test can also be used in the office, but most companies rely on a complete telephone system with cable or on the use of smartphones. For smaller companies the cordless telephone is a practical choice, because it can be taken into the next room if necessary, for example to check a order or to check the status of the work.

The cordless phone, is especially practical when you don't even have to hold it in your hand anymore. You just turn it on loud and you have your hands free and can do a few things while on the phone. This also works without the speaker if you have a headset. This can be connected to the phone via radio or Bluetooth. This makes telephoning even more convenient. If you are sitting at the PC, you can type in the information received from the caller immediately without having to have a hand on the phone all the time.

At home, the cordless phone usually finds its fixed master station in the charging station, which also functions as a base station. This saves users having to search for the handset. The different designs of the stations and phones can be adapted to the personal furnishing style so that the cordless phone does not become a foreign object. This is not only an important point for frequent callers, but also for people who value a certain aesthetics.

Features, functions and special shapes

The functional scope of a current cordless telephone goes far beyond making a simple telephone call. Numerous additional functions are designed to simplify the handling of these powerful devices and make them as convenient as possible.

Analog vs. ISDN

Analog vs. ISDN

As an international standard, the Integrated Services Digital Network (ISDN) opens up the extensive possibilities of a digital communication network. In addition to a significantly higher transmission rate, which is less important for simple telephony than the transmission of computer data, ISDN, unlike the analogue telephone network, offers some convenience features. With ISDN, it is possible to transmit several channels simultaneously via one connection. This means that several telephone numbers (up to 10 in Germany) are available to the user on one connection and even on one terminal device, and it is possible to make calls simultaneously over several lines or use a second line in parallel with data transmission.

In addition, ISDN offers a variety of so-called additional services:

  • CLIP – Calling Line Identification PrensentationThe transmission of the caller's phone number to the called party.
  • CLIR – Calling Line Identification RestrictionA possibility to suppress the transmission of the own phone number, also called Number suppression. Only possible to a limited extent: not possible for rescue services, police and fire brigade, for example.
  • CW – Call WaitingFunction known as Call Waiting where a second call is signaled by an acoustic signal (**call waiting tone**) during an existing call. A second call reported in this way can be accepted, ignored or rejected. The caller hears a ringing tone, even if the called number is already spoken to.
  • CFU – Call Forwarding UnconditionalCall forwarding, where an incoming call is forwarded to a stored phone number.
  • CFB – Call Forwarding BusyCall forwarding on condition that the original destination number is busy.
  • DDI – Direct Dialing In – ExtensionForward an incoming call to an extension.
  • AOC – Advice Of ChargeTransmission of charge information to the telephone connection.
  • CH – Call HoldHold of the call partner in an active connection. The subscriber is redirected to a waiting loop, usually with an announcement or music on hold.
  • MSN – Multiple Subscriber NumberShare several phone numbers of an ISDN basic access line among several connected terminals.
  • CUG – Closed User GroupRestriction of rights within a telephone network for a group of subscribers. Individual internal and external subscribers can be blocked.
  • OCB – Outgoing Call BarringCall number lock for outgoing calls.
  • HL – Hot LineAutomatic establishment of the connection to a defined phone number at every lift-off.
  • TP – Terminal PortabilityParking a connection to resume the call on a second terminal.
  • UUS – User to User SignalingTransmission of control signals during call setup, call or connection termination.
  • CFNR – Call Forwarding No ReplyCall forwarding if a call is not accepted.
  • COLP – Connected Line IdentificationRequesting the phone number information of the called party. Used, for example, to display the call forwarding by the called party.
  • COLR – Connected Line Identification RestrictionCancellation of number transmission by the called party after request by the caller (COLP).
  • CCBS – Completion of Call Busy SubscriberAutomatic reestablishment of the call if the line of the called party is busy. When the line is free again, the call is automatically established and signalled to the caller.
  • SUB – SUBadressingInformation transfer (20 bytes max.) from caller to receiver during connection setup.

ISDN telephones are less common as cordless telephones. Last but not least, an analogue terminal can usually be operated with little effort on an ISDN line, but ISDN terminals are not suitable for operation on an analogue line. In addition, ISDN devices are usually significantly more expensive to purchase and the range of different models is smaller.

Of a total of about 37 million telephone lines in Germany in 2017, only about 15% were ISDN lines. There is a clear trend away from ISDN connections towards modern alternatives. In the meantime, Telekom has announced that the ISDN service is to be discontinued by the end of 2018. According to third party suppliers, the offer will continue until 2022. The conversion is in favor of the Voice over IP technology (VoIP) already in use for more than half of all connections. The telephone connection is established via computer networks according to Internet standards.

With the corresponding standard devices (e.g. commercially available Internet routers), it will continue to be possible to use both analogue and ISDN terminals such as cordless telephones to their full extent despite the forthcoming changes. In order to be able to use the complete range of services of a VoIP connection, it is recommended to use a designated WLAN telephone.

Answering machine

Answering machine

The classic answering machine is already known from times when you only used wired landline phones. It enables a message to be played when a call is made and, if desired, gives the caller the opportunity to leave a temporary message. Depending on the model, the maximum duration of an announcement as well as the duration of a single message and all recorded messages are limited. Answering machines can usually be operated from the base station as well as from the handset.

Additional Handsets

Additional Handsets

As a rule, up to six handsets can be operated on one base station. Calls can be answered and established at any of the connected devices. You can also make internal calls and forward calls from one handset to another (**switching**) or transfer an external call to several handsets simultaneously (**conferencing**). Additional handsets usually have their own charging cradle which is connected to the mains and serves both as storage and for charging the batteries of the handset, but does not have its own connection to the telephone network.

Cordless telephones are offered by many manufacturers from the outset in sets with at least one additional handset. Packages with a total of up to four handsets are also not uncommon. Other manufacturers offer the possibility to purchase additional handsets afterwards. The DECT-GAP Standard also makes it possible to connect handsets from other model series or even from other manufacturers to an existing base station. The so-called Paging call makes it possible to locate misplaced handsets: a keystroke on the base station triggers a radio signal that triggers an acoustic signal on all connected handsets until it is acknowledged on the individual handset.



The main argument for using a cordless telephone is the associated gain in freedom of movement. Some manufacturers offer additional headsets, i.e. headphone-microphone combinations that can be connected to a cordless telephone so that it does not have to be held in the hand when making a call, for those who additionally need to keep both hands free when making a call.

As a rule, headsets are connected to the handset via Bluetooth. Incoming calls can often be accepted and terminated directly on the headset, outgoing calls must be initiated on the handset and then transferred to the connected headset. The Bluetooth standard also allows the use of headsets from other manufacturers than the connected telephone. However, full compatibility must be checked on a case-by-case basis, as experience has shown that difficulties in establishing a connection or restrictions in the scope of functions regularly occur.

Some models offer the additional or alternative connection of a headset with a cable connection via a jack plug. This variant also allows hands-free communication, but the handset must be worn on the body according to the available cable length.



Most cordless phones have a hands-free function beyond the optional use of a headset described above. A loudspeaker built into the handset is used for this purpose, which is activated at the touch of a button and transmits incoming audio signals. The telephone microphone, which is also used outside the hands-free function, serves as the microphone. With some models, hands-free operation is possible alternatively or additionally on the base station.

In hands-free mode, two different methods are used, which significantly determine the quality of the function and thus of the entire cordless telephone:

  • Half-duplexWith the half-duplex method, also referred to as intermittent operation, acoustic signals can only be transmitted in one direction at a time. This means that signals are either transmitted to the loudspeaker or from the microphone of the cordless telephone. A simultaneous transmission does not take place. This significantly restricts the quality of the speakerphone mode.
  • Full duplexIn contrast to the half duplex method, signals in full duplex mode are transmitted simultaneously in both directions. Both parties can speak simultaneously without restriction, both voices are also played simultaneously. The quality of the speakerphone is significantly higher with the full duplex method, which is used today by most cordless telephones with speakerphone function, and should therefore be clearly preferred when making a purchase decision.

In addition to the type of signal transmission method used for hands-free speech, the selection of the installed components is decisive for the speech quality. With particularly inexpensive models, with correspondingly inferior components, as for example the necessary loudspeaker, the sound quality is accordingly limited.

The same applies to the microphone, where the quality requirements for hands-free talking are significantly higher than those for a normal telephone call. The use of high-quality components, on the other hand, offers transmission and reception quality that makes hands-free talking convenient even over long distances. Cordless phone tests usually also check the concrete quality of voice transmission in hands-free mode.

Color display

Color display

A display is an indispensable aid for establishing or accepting telephone calls. Dialed numbers are displayed, as is the transmitted number of a caller. Entries can be added to or selected from a phone book and called or edited. All settings and functions are operated via the display. Good legibility is therefore an indispensable quality feature. Simple LCD displays are single-line and display a limited number of characters simultaneously.

In most cases, additional symbols can be shown at the edges of the display to indicate, for example, the reception quality or missed calls and messages. Most cordless telephones already use multi-line displays, which significantly improve readability and operation. A modern display should be illuminated so that a cordless telephone can be operated easily even under poor lighting conditions and an incoming call can also be visually signalled. Often you can choose from different colors of a backlight.

Modern, high-quality cordless phones are increasingly approaching the optical standard of mobile phones. This also includes the use of large colour displays based on TFT technology. These enable convenient operation of all optically displayed functions and extend them further. For example, as with a mobile phone, images can be assigned to individual entries in the phonebook, which are then displayed for incoming calls.



The acceptance of an incoming call, the establishment of an outgoing call as well as the operation of all further functions, which a cordless telephone makes available to the user, is carried out via keys on the telephone. Depending on the manufacturer and model, these differ in number, arrangement, size and material and thus allow a more or less comfortable operation.

Some models use simple rubber keys, while others use plastic or metal keys. The material and the workmanship determine the long-term durability and resilience of the keyboard. In addition, different materials are differently susceptible to contamination and can be cleaned differently well.

Rubberized keys are pleasant to use, but dirty faster. In addition, different substrates offer different levels of adhesion for a necessary inscription. Especially with long-term intensive use, printing can rub off and become illegible. The illumination of a keyboard enables the operation of a cordless telephone even in unfavourable lighting conditions and is therefore an important quality feature.

An important control element of a cordless telephone is the volume control of the handset. A useful feature here is a separate setting option based on the model of a mobile phone, which makes it possible to change the handset volume during a call. Some manufacturers today already use touch screen displays familiar from mobile phones, which are intended to ensure convenient operation of all necessary functions.



An incoming call is signalled by a ring tone. A limited selection of tone sequences or simple melodies is available for simple models. Modern cordless telephones of the upper class are also approaching the technology of mobile telephones in this area: an often extensive selection of so-called polyphonic ring tones is available here.

Some models also offer the option of downloading your own ringtones or melodies in a suitable format (e.g. MP3) to the telephone at a later date. As a rule, an individual ring tone can also be assigned to each stored contact or contact group, so that the acoustic call signal already indicates who is calling. A call signaling by alternative or additional Vibration of the handset approaches some cordless phones further to the standard of mobile phones.

SMS function

SMS function

The Short Message Service, i.e. the Short Message Service, is well known from the mobile network and very popular as a simple and fast form of communication, especially among young users. For some time now it has been possible not only to send SMS messages within the mobile network, from mobile phone to mobile phone, but also to transfer messages from the mobile network to the fixed telephone network.

On the part of the mobile phone user, this is proceeding as usual. On the landline side, the type of transmission depends on the terminal used: On models without SMS function, an incoming SMS message is read to the recipient by a computer voice using the SMS-to-Speech procedure. If a cordless phone has an SMS function, a text message is displayed on the phone display, as is usual with a mobile phone.

However, to send a text message from a fixed line to another number, mobile phone or also fixed line, as well as FAX connections or e-mail addresses, an SMS function is indispensable. With corresponding cordless telephones, the necessary service number of the fixed network operator, via which a text message is forwarded, is already programmed and SMS transmission is as simple for the user as from a mobile phone.

However, the sending of SMS messages to landlines is subject to certain restrictions. In the case of transmission using the SMS-to-Speech method mentioned above, a call setup to the recipient is necessary. If the number is busy or cannot be reached, the attempt is repeated at certain intervals. After a specified period of repeated attempts, the message is deleted. In addition, a transmission only takes place during a fixed period of the day so that a necessary call does not disturb the recipient's peace of mind at night.

Surveillance / Babyphone

Surveillance / Babyphone

A popular useful function of some cordless phones is the possibility of room monitoring or use as a baby monitor. Two handsets are required for both functions. With a baby monitor function, a handset is placed in the immediate vicinity of the child to be monitored. If there is significant noise, the handset establishes an internal connection to the second handset and transmits the ambient noise.

The room monitoring functions according to the same principle, but differs in that a connection between the two handsets is not established automatically, but the second handset must actively access the device in the room to be monitored.



For many users, the heart of every cordless telephone is the telephone book it contains. Names and phone numbers of all contacts are stored here. Individual models from different manufacturers differ in the design and extent of the telephone memory used. On the one hand, a varying amount of individual contacts can be stored, on the other hand, the individual models differ in the number of telephone numbers that can be assigned to a contact.

Most models connect to the phone book for incoming calls and display the contact name for calls to numbers stored in the phone book. Models with colour displays occasionally allow images to be saved to individual contacts. When calling a stored number, the corresponding picture will also be displayed. In addition, individual contacts can often be assigned their own ringtones or several contacts can be assigned to a group, to which a ringtone can also be assigned. Some models also allow call barring for individual entries from the phone book. Incoming calls from selected numbers are automatically rejected.

Fixed Network

Fixed Network

For many, especially young users, the mobile phone has already replaced the classic landline phone. Inexpensive flat rates make it possible to call landlines without additional costs and to make calls without looking at the clock. Nevertheless, for most users, the mobile phone cannot yet completely replace the fixed line for various reasons. In addition, a domestic Internet connection is usually connected to a telephone connection anyway. In addition to attempts by individual network operators, some manufacturers of cordless phones are also trying to combine the two technologies in a meaningful way. Such models are visually the same as the Smartphones models used in the basic operating system, in terms of functionality and appearance. Telephone calls are made via a mobile phone network using an inserted and activated SIM card. If the handset is within range of its base station, which in turn is connected to a landline, it connects to it and functions as a normal cordless telephone. This means that incoming landline calls can be accepted and outgoing calls can be made via the landline.

USB port

USB port

A USB port on the cordless phone allows you to connect to a computer. In addition to some additional functions, such as the initiation of a dialing process from the PC, this connection is primarily used to synchronize the telephone book. Some models work with the vCard standard known from computers and mobile phones, which enables simple transmission and integration of data.

Senior Phones

Senior Phones

Older people have special demands on a suitable cordless telephone. These concern on the one hand the design and on the other hand a desirable range of functions: A particularly space-saving design is not in the foreground in this segment. On the contrary, in mobile phones suitable for seniors, additional function keys should be omitted in favour of the size of the central controls, such as the number keys and those for answering and ending a call. The ease of operation was to be further enhanced by an easy-to-read, large and clearly structured display.

Quick dialling keys are also suitable for making it easier for older people to use a cordless telephone. Individual numbers stored in the telephone book can be linked to keys on the telephone. These are either separate keys, or the number keys, which initiate a call setup by a longer pressure. A direct call function also allows the cordless phone to be programmed so that pressing any key initiates a call to a selected number.

So-called emergency telephones also offered under the designation SOS- or emergency call function are similar in their function to the described direct dialling procedure: via a separate, clearly visible and easy-to-operate key on the telephone, a programmed emergency call is made to at least one fixed number. These numbers are dialled repeatedly until a call is answered. Then a previously saved message is played and/or a hands-free connection is established. Some models offer an additional emergency call wristband. Worn on the wrist, it consists of a transmitter that triggers the emergency call described above at the push of a button.

Additional Functions

Additional Functions

Some models offer more useful functions than just the telephone function. These include, for example, a built-in calendarwith birthday reminder or a alarm function. Some models also have a so-called night mode. The telephone is muted at the push of a button or time-controlled.



As superficial and subjective as the criterion may be, for many prospective customers the design of a cordless telephone is a decisive buying criterion. Processing and materials used are important quality features and also serve as external proof of the overall quality of a device. While simple models are usually made exclusively of plastic, premium models often work additionally with metal or high-quality lacquered surfaces. There are no colour limits for the manufacturers, but combinations of black, white and/or metal-coloured surfaces are common.

While most manufacturers build on a classic straight-line, rectangular shape, models in comparatively exotic shapes are also offered which, in addition to pure functionality, build on a value as a decorative furnishing item. However, design, size and weight are not only factors of subjective taste, they also determine the operability of a cordless phone, not least for people with physical disabilities.

Known manufacturers

Numerous well-known and lesser-known manufacturers are fighting for the favour of telephone buyers. Among them are those who have been active for many years in the electronics segment and here especially in the telephony sector and have often made a name for themselves in other areas of Consumer Electronic, as well as those who must be described as noname manufacturers and above all draw attention to themselves via the price.

  • Gigaset
  • Panasonic
  • Philips
  • Grundig
  • Medion

For a long time, the name Gigaset stood for the luxury class of cordless telephones. The listed German company was originally a brand of_Siemens Home and Office Communication Devices_ and operated under the name Arques Industries until 2010. Gigaset produces and markets cordless telephones for analogue and ISDN network operation or VoIP. The devices attach great importance to innovation, design, functional diversity and high-quality workmanship and are in the upper price segment.

The Japanese Panasonic Corporation produces a variety of different products, both for industry and from the consumer electronics segment as well as household appliances. The extensive range of cordless DECT telephones for analogue operation includes both individual devices and sets with up to four handsets. Design and functionality are a central feature of Panasonic cordless phones. The range is found in the lower and middle price segment. The offer also includes individual models from the category of the described fixed network mobile phones.

With more than 100,000 employees and an annual turnover of more than 20 billion euros, the Dutch company is one of the largest electronics groups in the world. Founded in 1891, Philips quickly focused on radio and television products. Today, the range includes products from the consumer electronics sector as well as household appliances of various kinds.

Cordless telephones are offered by Philips in two categories: a_Klassik series_ with numerous models, as single devices or sets with several handsets, in different designs with different functional ranges. The models of the Klassik series are in the middle price segment. As a second line, Philips offers a Design series in which optical models in the medium and upper price segments are offered.

Founded in Fürth in 1930, Grundig AG was forced to file for bankruptcy in 2003 despite interim support from the Philips Group. The brand name_Grundig_ is still used today by various companies. Cordless phones are produced under the name Grundig Intermedia GmbH, based in Nuremberg, Germany, which belongs to the Turkish manufacturer Arçelik and thus to the largest Turkish group of companies Koç Holding.

Under the brand name Grundig numerous cordless telephones are offered, both in the classical, and some models in special designs. Grundig telephones serve the lower and middle price segment.

The sales company Medion AG has become known above all for its product range offered by discounters. However, electrical appliances under the Medion brand name are also offered by other retailers, both online and offline. The simple and functional models of cordless phones are offered in the lower price segment.

Current consumption and radiation from cordless phones

For some time now, German households have been paying more and more attention to the electricity consumption of various household appliances. Whether the new flat screen TV, the new table lamp or the cordless phone, all these devices require electricity for commissioning and can more or less drive up the electricity bill. It is therefore worth paying attention to the electricity costs of the individual devices. Almost everyone has a smartphone and can therefore be reached around the clock. Nevertheless, many do not want to do without a landline phone. Cordless phones are clearly in line with the trend in this field. If you want to buy a new telephone or simply replace your old one with a modern one, you are spoilt for choice.

The range of cordless phones is very versatile. However, there are a few important things you should keep in mind when making a purchase. Since a cordless phone is usually supposed to be operational 24 hours a day, 7 days a week, the telephone naturally also causes electricity costs.

The cost of electricity from a cordless phone

Sinus 40318195 CA 37 Quattro cordless phone (dot matrix display, answering machine) anthraciteAs manufacturers are aware that more and more customers are paying attention to power consumption, they are upgrading. Today's modern cordless phones are very low in power consumption and even in standby mode almost no power is consumed. In general, however, it is important to deal with this topic before buying. A free comparison on the Internet helps to find an energy-efficient cordless phone. Tests have shown that there are considerable differences, especially in power consumption. Although the power consumption of cordless phones is very low compared to other household appliances, why should you pay unnecessarily much for it if there are other ways?

However, since there are also enormous differences to the individual models, very precise data on power consumption can hardly be determined. However, the test results show that modern cordless phones achieve a power consumption of about 0.6 to 1.2 watts. But now it depends on your electricity price how high the electricity bill actually will be.

If you need further information about power consumption, please have a look at the information of the manufacturer or check the internet. You will certainly find a lot of information on this topic.

The radiation from a cordless phone

Whether in the office or at home, cordless phones are an integral part of everyday life or office life. When it comes to buying a landline phone, the choice falls on a wireless model. A cordless phone offers flexibility and enormous freedom of movement. Whether in your own four walls or at work, a cordless phone is almost a must. Unfortunately, the phones are also repeatedly confronted with criticisms and these are usually the dangerous beams.

Axiety is completely unfounded according to expert opinion

broadcast-297434_1280When the battery is discharged, thermal effects occur which are supposed to have a harmful effect on health. Experts have taken a closer look at this myth and have come to the conclusion that this statement is true, but that even a longer use of the cordless phone does not pose any danger to humans. The radiation is therefore so low that you need have no concerns or worries. One misconception is that a cordless phone exposes to radiation similar to X-rays or gamma rays.

Safety first – no harmful radiation

Messages about dangerous radiation on a cordless phone are very persistent. Exactly for this reason the manufacturers want to work against it and offer new models. When you buy a low-radiation cordless phones. These models do not emit any radiation at all when the handset is on and are therefore very popular with many customers. If you prefer such a cordless phone, you should select a model with ECO mode Plus.

In summary, it can be said that cordless phones are not dangerous for health when used and the new models hardly cause any electricity costs. If you still have an older model at home, you should exchange it for a modern version. Many old appliances cannot keep up with the new ones in terms of power consumption and they also do not have ECO Mode Plus. This technology ensures that virtually no radiation is emitted from the telephone.

Basics of a purchase decision

At the beginning of a purchase decision is usually the basic question whether a cordless phone is the right choice for personal needs. If a cordless telephone is not to be a supplement but a complete replacement for a wired device, it is worth considering the advantages and limitations of the two different designs.

Cordless phone vs. wired landline phone

The wired telephone was the irreplaceable standard for many years. The first models of cordless telephones could hardly fully replace them. Today, modern devices offer at least the same range of functions as fixed network models, and even go beyond them. When it comes to voice quality, at least high-quality cordless phones are in no way inferior to their wired competitors. Nevertheless, there are factors that should be considered when making a purchase decision.

Wired telephones


  • large product variety
  • highest speech quality
  • insensitive to interference
  • constant Power supply
  • high ease of operation


  • limited radius of movement

Cordless phones


  • significantly increased radius of action
  • numerous convenience and additional functions
  • expandable


  • radio connection dependent
  • depending on batteries / rechargeable batteries

Basically, there are hardly any functions that a wired telephone offers that are not offered by a comparable cordless telephone. On the contrary, the mobility of a cordless telephone enables different functions, which a wired device cannot offer sensibly: Room monitoring, baby monitor, alarm clock and emergency call functions can be used much more conveniently and extensively with a handset.

In contrast to devices of the first generations, modern cordless phones are significantly less susceptible to interference. Nevertheless, the connection between handset and base station is a radio connection which is subject to all known restrictions compared to a cable connection.

Power supply

A significant weak point of cordless phones is the necessary power supply. In contrast to early models, telephones today generally require a power supply in addition to the pure line current of the telephone line. In the case of wired telephones, this is done via a mains power connection. Cordless telephones, on the other hand, in addition to the mains power connection of the base station or an optional charging station, depend on the handset being powered by rechargeable batteries.

Basically two systems can be distinguished here: a power supply by a model-specific battery or such by commercially available universal rechargeable batteries.

Universal rechargeable batteries are mostly of the type AAA (Micro), rarely of the type AA (Mignon), which are offered by countless providers in the specialized and retail trade as well as in the Internet and mail order business. Current models are nickel metal hydride (NiMH) rechargeable batteries. The battery capacity, expressed in milliampere-hours (mAh), is of particular relevance.

This value determines how long a battery can supply a cordless telephone with power without being charged in the meantime. As long as a handset is connected to the base station or a charging cradle, the batteries used are charged. The maximum capacity of a battery therefore also depends on the charge current with which this station operates.

Alternatively, some manufacturers rely on special rechargeable batteries, as they are also known from mobile phones. Their advantage is on the one hand that their performance and capacity are precisely matched to the respective device and on the other hand that their shape allows a more individual design of the handset . Design telephones that have just been designated would be severely restricted in their design by the use of standard batteries.

Modern NiMH rechargeable batteries are reliable and resilient. A memory effect can be excluded according to the manufacturer. The naturally irregular loading and unloading of a cordless phone should not damage the batteries and should not cause any loss of performance. Nevertheless, batteries have limitations. Above all, there is at least a slight self-discharge. In addition, depending on quality, batteries have a limited life, measured in**charge cycles**.

For both designs, universal battery or manufacturer battery, at least one battery or battery pack belongs to the basic equipment . While universal batteries can easily be replaced by easily available compatible models, model-specific batteries are often only available from the phone manufacturer or suitable suppliers. The unprepared failure of a rechargeable battery can therefore be a significant problem in case of doubt. In this respect, cordless telephones with universal rechargeable batteries have an advantage.


The basic decision criterion for a cordless phone in direct comparison with a classic wired device is the freedom of movement that a cordless phone promises its user. No handset cable that tangles and knots itself and ties the person making the call to the location of the telephone.

When telephoning with a cordless phone, you can move freely and even have both hands free with suitable aids, such as a Headset or a Handsfree function. For many customers, the idea of being able to move freely and make phone calls in the entire apartment, in the house and even in the garden is one of the main reasons for being interested in a cordless telephone.

This notion is, however, put in its place by technical circumstances: cordless telephones also have a limited range. If this number is exceeded, no telephone call can be made, the connection between the base station and the handset is terminated and an active call is interrupted. The range of a cordless telephone in practical use depends on numerous factors. The information given in cordless phone tests or by manufacturers is, in this sense, of a rather theoretical nature and only conditionally meaningful.

Manufacturers advertise with a range of up to 300 meters. However, this information usually refers to the transmission power in the open field, i.e. with an unimpeded, direct connection between the base station and the handset. Such a constellation will, however, rarely be found.

The base station of a cordless telephone is usually located in a room of an apartment or house, i.e. separated from the rest of the environment by walls. A radio signal penetrates normal doors and walls, but is attenuated and its range limited. In order to be able to use the technical maximum range of a cordless telephone optimally or even to extend it, various measures and aids are available.

Selection of the installation location

Central to a Optimal use of range is a carefully selected location for the base station. Walls restrict the radio signal just as much as furniture placed in the immediate vicinity, for example. As far as possible, all obviously disturbing conversions should be avoided. In general, even a slightly changed installation location can improve the transmission power. Here the best variant should be determined by the practical test.

The base should, as far as possible, be placed in the center of the desired radius of action in order to allow maximum freedom of movement in all directions.

Range increase through repeater

Repeaters are known to many users of WLAN networks. Even with DECT radio networks, these additional devices make it possible to significantly increase the range and thus the radius of action. The repeater works as a component between the base station and the handset: a radio signal is sent from the base station to the repeater, amplified by the repeater and forwarded to the handset.

Conversely, the signal exchange takes place in the direction of the base. This theoretically doubles the range of a DECT signal. However, the signal of a repeater is subject to the same restrictions as that between the base station and the handset, i.e. it is restricted by walls and other obstacles.

By the optional use of several repeaters, a DECT signal can be extended in several directions and thus a significantly enlarged radius of action can be achieved.

A coupling of several repeaters one behind the other is only possible with a few models. Where this is the case, however, a considerable increase in reach can be achieved. Thus, three coupled repeaters result in a theoretical range of up to 1200 meters.

The repeaters offered by different manufacturers are usually DECT-GAP capable, which means they are compatible with other manufacturers. In particular, if encryption is used, the exact manufacturer's specifications should be observed. For example, the maximum number of repeaters that can be used simultaneously is limited if encryption is to be guaranteed even if the range is increased.

Sources of supply – specialized trade vs. Internet

Cordless telephones are offered on a large scale in specialist and retail outlets. Department stores and electronics markets have a permanent offer, discounters regularly offer individual models. However, the choice is more or less limited for each individual supplier in the specialist and retail trade as a whole.

The Internet offers in direct comparison the largest, unlimited selection of different manufacturers with their complete range of models. In addition, the comparison of different providers enables significant price advantages. Technical details and the range of functions of individual models can be conveniently compared and weighed according to personal requirements. Cordless phone tests also offer regular expert assessments of comparable models.

Statistics, numbers, data and facts about cordless phones

The cordless phone is a very good invention and is an indispensable part of everyday life. Whether at home or in an office, many already enjoy the benefits of this phone. Finally we don't have to worry about the tedious tangle of cables on the phone anymore and we can still move around freely on the phone. The range of the phones has also been improved in recent years and with a repeater, it can even be increased if necessary.

The cordless phone has quickly replaced the wired landline phone and therefore cordless phones are already standard equipment in German households. When the smartphone made its triumphal march around the world, many thought that the landline phone would soon disappear completely from the scene. Quite the contrary, that a landline phone will probably always give is. Especially in an office such a telephone is indispensable. Equipping employees with a smartphone and many different phone numbers simply makes no sense and also costs a lot of money.

What else should you know about the cordless phone?

Today's modern telephones have a powerful and long-lasting battery. Many manufacturers use a lithium-ion battery for this purpose. The advantage is that this battery is very light and therefore provides a very easy handling and operation. According to statistics, there are still many landline connections in the Federal Republic of Germany. Every day there are over 700 million outgoing call minutes in Germany and about 85 percent of all households have a landline connection. It can be assumed that there are just as many cordless phones in Germany. Deutsche Telekom manages around 23 million lines and, given these figures, the smartphone does not actually have a negative impact on the fixed network.

When was the phone invented?

The history of the telephone goes back to 1861. On 26 October, Johann Philipp Reis presented the first telephone to the public. In order to be able to check the transmission, he chose the sentence “The horse does not eat cucumber salad”. Since that moment, the phone has been developed regularly and it took over 100 years to introduce the first non-wired phone. The number of sales of cordless phones has also increased significantly in recent years. This circumstance has nothing to do with poor quality or short shelf life.

If you need further information, data or facts about Cordless phone, please feel free to read through Test reports on the Internet at any time. Here you will find everything you need to know about telephones and cordless phones.

The cordless phone has been around for over 30 years now. The models at that time were still very heavy and unwieldy. Fortunately, this situation has improved. Equipped with a lightweight lithium-ion battery, today's cordless phones are very light and have a good grip. The range was likewise improved in the last years and it gives besides also very much accessories for a Schnurlostelefon. In Germany there are approximately 23 million fixed net connections and the number of the outgoing call minutes per day are impressing. In view of these figures, Deutsche Telekom is doing a very good job. The smartphone has significantly changed our telephone behaviour and although almost all of them have a mobile phone, there is no evidence that they are not using a landline. Almost 90 percent of households in Germany have a landline connection.

The history of the cordless phone

The history of the cordless phone is based on that of the phone itself. Telephone technology is based on a multitude of individual inventions starting in the first half of the 19th century. These partial inventions eventually lead to the invention of the telephone, now attributed to Alexander Graham Bell. 1876 this is presented for the first time in Boston.

The range of this groundbreaking invention was up to sensational 61 kilometres. The first functional phones were set up in 1877. The_self_dialling_ method, the basis of modern telephone conversations, which makes it possible to establish conversations between two subscribers without the usual switching centres, was also patented in the USA in 1891.

Other significant developments on the way to the modern telephone of today's design are impulse dialing (Germany, 1913) and_multi-frequency_dialling_ (USA, 1955). The modern computer technology has rapidly advanced the further development of the telephone in recent decades. Semiconductor technology has made telephones ever smaller and made new additional functions possible.

The cordless telephone is attributed as an invention to the American inventor George Harry Sweigert, who received the patent for it in 1969. In addition to the technical development of the cordless telephone itself, the type of radio transmission between the handset and the base station connected to the telephone network has also been continuously further developed. Different transmission methods were used between 1984 and 2008.

In detail, these were the procedures CT1, CT1+, CT2 and the not practically implemented procedure**CT3**. The latter was replaced in 1992 by the DECT procedure which is still in use today. Modern cordless phones also use the transmission standards of**Bluetooth** and WLAN.

W10 Questions about cordless phones

Question 1: What radio range should the cordless phone have?

Most cordless phones from the test comparison offer a range of 300 m, based on free space. In the apartment this is up to 50 m depending on the ceilings and walls. The test winners of the cordless phones work with a strong radio signal and penetrate easily through seven walls and three ceilings, while slightly weaker models only create five walls and two ceilings.

Question 2: Why is a cordless phone with answering machine worthwhile?

Most current phones have an answering machine, but there are also models without AB. Since the price difference is only small, you should immediately choose the variant with AB, because you do not need an additional device. This saves space and electricity. In addition, you have a secure feeling, because when an urgent call comes in, you can immediately trace it with the answering machine.

Question 3: Which additional functions are available for cordless telephone n useful?

Distinguishing between standard functions and extras is not easy with cordless phones. The speed dial keys and the integrated telephone book increase convenience, as does the hands-free function. Also the answering machine should not be missing. Whether you need an Eco mode and a Call-through function depends on your own priorities.

Question 4: Where is the best place to put the handset?

Many users have become accustomed to placing the phone in the base station. So they find it quickly again and the battery does not discharge. However, some consumers fear that the battery suffers if it is constantly recharged. However, this risk is very low if it is a modern Li-Ion battery. With this type of battery, deep discharge is generally more dangerous than parking in the charger.

Question 5: Which battery types are standard today?

In former times NiCd batteries were in great demand, then NiMH batteries came up. In the meantime, the Li-Ion batteries are particularly popular, as are the LiPo batteries. Here the capacity is very high, at the same time these batteries are very light and they have only a minimal to no memory effect. The electronics of the charging circuit has adapted to this new battery technology, so that optimal charging is guaranteed. As a result, the new batteries are very powerful and have a long life.

Question 6: What to consider when switching from classic> Phoneen to IP Telephony?

Since 2010, conventional telephones have been increasingly replaced by IP telephones. As a result, more and more households have a hybrid telephone line. As a result, many consumers still use analogue devices to make phone calls, but surf digitally. Soon the complete communication will only take place via the digital line, but this will only have advantages for the users. You don't have to worry about anything, as the telephone providers make the necessary changes.

Question 7: What is it about the DECT technology of cordless phones?

The cordless telephones function largely on the basis of DECT technology. This standard allows a maximum of eight handsets to be connected to one base station. The manufacturer's brand is irrelevant, you only have to make sure that the phones are compatible with the DECT standard of the base.

Question 8: How can DECT radio radiation be reduced when making wireless calls?

With the classic cordless phones from the Test 2019 the radio beams are permanently transmitted, even if you are not on the phone and the handset is in the base station. If you are worried about the constant radio radiation, you can opt for a cordless phone with Eco-Mode or Eco-Mode Plus. Here the radio beams are reduced and sometimes even switched off completely if the telephone is inactive.

Question 9: Which connection do you need for the cordless phone: analogue or ISDN?

In the test of cordless telephones, there are models that are suitable for both an analogue and an ISDN connection. Basically, you can only use analog telephone devices with an analog connection. With the ISDN connection, however, the analog devices can also be connected.

Question 10: What are Eco Mode and Eco Plus Mode?

With an Eco Mode cordless phone, radiation is reduced when you are not making a call. A reduction of up to 80% is possible, resulting in a low-radiation environment. In Eco Plus Mode, also known as Full Eco Mode, the handset's radio signals also switch off, even if these devices are not in the base station. This Eco Plus Mode turns itself on after a period of time when the phone is not in use.

Environmental pollution

The use of cordless phones causes heated discussions again and again. It is well known that such a telephone emits radiation and can be dangerous to health, at least when it comes to the opinion of some critics. The fact is, however, that the radiation emitted is so low that even after prolonged use it is not dangerous for humans at all, or can ever become so. So you can use a cordless phone with a clear conscience. Since a cordless phone is also a device that has to be connected to the power supply, the environmental impact is often discussed.

More specifically, electrosmog. Due to the advanced technology we encounter electrosmog not only with a cordless phone. Whether with a smartphone or tablet PC, the allegedly dangerous radiation from WLAN and other wireless applications is a constant concern for many. Although electromagnetic fields are present, they are not dangerous to human health. It goes without saying that everyone should handle technical equipment carefully and with moderation and purpose. However, it must also be admitted at this point that there is still a need for research on this issue. Tests by experts have shown that the use of a cordless phone should not give rise to environmental concerns.

Environmental impact increases

If one considers the fact that more and more electrical products are in circulation, this can of course have an impact on environmental pollution in the longer term. However, if these are limited to a cordless phone, there is no reason for discussion here. In addition, manufacturers constantly equip their devices with new achievements that have a positive impact on the environment. Therefore, pay close attention to such functions and properties when purchasing and make a small but important contribution to environmental pollution.

In summary, the issue of environmental pollution is becoming increasingly popular. Electrosmog is an important topic, which should not be taken lightly at all. Therefore you should always pay attention to a careful and purposeful handling. When the phone rings, however, you can take off calmly, because with normal use of a cordless phone you usually do not have to worry about environmental pollution.

News regarding cordless phones

Cordless phones are becoming more and more popular. This fact can also be demonstrated by the 23 million fixed-link lines in Germany. Since the sales figures are constantly rising, the manufacturers are constantly coming up with new technologies and integrating them into the phones. So it is not uncommon today that the range of a cordless phone reaches over 300 meters or the landline phone has a color display. The fact is that there are technical innovations at regular intervals for cordless phones.

The base station is connected to the mobile unit via electromagnetic waves. Since this is radiation, there are always persistent rumours about a health hazard. This could not be scientifically proven and yet the manufacturers reacted to it. The new telephones now emit virtually no radiation. Thus many worries and concerns can be taken away. So the manufacturers are trying to let this myth finally die out.

Up to 10 numbers can be integrated with a digital telephone connection. In some areas an immense advantage. In addition, the cordless phones are becoming more and more similar to a smartphone in terms of appearance and also in terms of functions. These novelties are now available at cordless phones:

  • Color display: You like it colorful and clear, then you should reach for a Cordless phone with a color display.
  • Touchscreen: A smartphone is operated via the touch screen. Meanwhile some cordless phones also have this function and feature.
  • hearing aid compatible: When you need or use a hearing aid, telephoning is not always easy. A correct and usually very complex setting on the hearing aid is necessary for good and understandable communication via a telephone. Therefore, many manufacturers make sure that the cordless phone is hearing aid compatible. These models usually have a 30 decibel gain and a very loud ring tone. Interference-free reception is also guaranteed.

If you value technical innovations in a cordless phone, you should choose a well-known brand. Since business is lucrative for manufacturers and the business is financially worthwhile, more and more manufacturers have entered this market in recent years. Whether Siemens, Grundig or Philips, of all these manufacturers there is a good and durable cordless phone.

In terms of storage space and equipment, a lot has also changed in recent years. With a cordless phone you can make up to 200 phone entries or you can choose a device with an integrated answering machine. So you can see that a lot has been done in this area and with certainty the manufacturers can still come up with some technical refinements in the future.

In summary, it can be said that cordless phones already offer a multitude of functions and features today. They are getting closer and closer to the operation and appearance of a smartphone. Whether a colour display with touch screen, a large telephone memory, an integrated answering machine or a range of up to 300 metres, the technical key data are impressive. If you are interested in a cordless phone, please read the individual test reports in advance. This ensures that you get a modern cordless phone with many functions. We are sure that you will be excited about the latest techniques in a cordless phone.

Convince yourselves however simply and inquire you in the specialized trade and let you advise or get yourselves you the necessary information completely simply over Internet. With a cordless phone you are not restricted in your freedom of movement and you enjoy many other advantages.

Useful accessories

When using a cordless telephone, you often need not only the standard equipment, but also other accessories. A connection cable may have to be purchased if the previous cable does not fit. In addition, there are the corresponding cable ducts and bushings. This allows you to make your telephone connection invisible, whether in your study or in other areas of your home. However, when using VoIP phones the telephone line is not used, which simplifies the installation.

If there are sometimes weaknesses in the transmission of the radio signal, a repeater helps. This improves the signal quality and is particularly suitable for somewhat larger apartments and houses. A signal amplifier can also be useful for commercial use of cordless telephones. The repeater increases the radius of the base station so that you can move about twice as far away from it. The repeater for the cordless telephone creates a second base, so to speak, so that the range is increased. This forwarding includes an encryption of the signals, which is important for the security against eavesdropping. The less high-quality repeaters not only amplify the input- and output signals, but also the noise in the background. With the better repeaters, the signal is composed so that the noise disappears. In some cases, the repeaters spread several signals so that on the one hand you can make better phone calls and on the other hand you have a stronger web radio reception.

Many users want a headset for convenient telephoning. Here you wear the phone on your head or directly on your ear so that your hands remain free. For example, you can do the ironing and call your friends at the same time. Just like the cordless phone, the headset should also work wirelessly to have good flexibility. In general the current headsets work via Bluetooth. With the sophisticated accessories for the cordless phones from the Test 2018 you can make calls comfortably and also benefit from a first-class signal quality. Among other things, there are supplementary call signal generators that accompany the ring tone with a visual signal. A separate answering machine can also be purchased if the cordless phone does not have an integrated AB.

The composition of your own telephone system is not always limited to the base station and a mobile device. It is also possible to use other handsets, but it is important to pay attention to the compatibility with the existing system. The model variety of the manufacturers offers the right device for everyone.

There are smart Children's phones in bright colors, large and intuitively operable senior phones as well as various standard phones for normal use. When setting up the cordless telephone, it quickly becomes clear whether you need another telephone plug or a TAE socket. In addition, the Telephone experts have all the necessary spare parts and supplementary components.

There are other telephone accessories available for professional use at the desk. This ranges from the practical holder to the second charger. In your own apartment, the typical small pieces of furniture and accessories are also part of the extended accessories of the telephone. A telephone console is the right place for the base station and also for the handset. Here you can find it with certainty, if it is not just on the way in the apartment. Even a small notepad with a pen is often located near the telephone.

Alternatives to cordless phone

As an alternative to the modern cordless telephones from the Test 2019, the classic telephones with cable are of course available. However, you then have less room to move and are not so flexible. Although wired telephones are less susceptible to interference, most consumers have become accustomed to the flexibility of cordless telephones. Even if the phone has a very long cable, it does not offer the same freedom.

In the professional environment, the wired telephone systems have nevertheless continued to prove their worth. This is due to the fact that the office workplaces are used as a permanent location. Here it is hardly necessary to change places or walk around with the phone in your hand.

Some companies are now using fewer and fewer fixed-line telephones, instead employees have their own company smartphone or use their own private mobile phone. These mobile phones score with similar advantages as the cordless phones from the Test 2019. The functionality of smartphones in particular has been significantly expanded, as they are also suitable for surfing the web and sending messages. However, there may be some difficulties with accounting. This also applies to privately used mobile phones, which are used instead of a landline phone. Often the costs for telephoning are clearly higher than with a fixed network contract. Here a exact comparison is worthwhile, in order to find the suitable tariff and to keep the overview.

Younger people are increasingly abandoning their own landline connections. As long as they don't have a permanent home yet, that may still make sense. They can be reached via their mobile phone and often conclude a cheap collective agreement. But at the latest when you settle down at home, the question of a suitable house connection arises. This includes not only telephony, but also the Internet. With the modern cordless phones from the Test 2019 the capacities can be used perfectly. Neither the telephones with cord nor the mobile telephones can keep up.


Cordless telephones expand the possibilities and the comfort of telephoning significantly. They are particularly popular in the private sector and have largely replaced the wired telephone. The limitations associated with the use of a modern cordless phone are so minor that they are of little concern to most users.

A simple wired phone as short-term replacement or supplement can create additional security. The foreseeable further development and spread of modern connection methods, such as VoIP telephony, will decisively determine a future-proof decision for a cordless telephone.

In the long term, models will prevail that benefit from the clear advantages of this technology. However, current DECT models can still be used to the full extent and with all possible additional functions. From a wide range of different models, different manufacturers, you will find the right offer for every need and not least for every budget.

A comparison of models of a class, such as cordless phone tests offer it at regular intervals, provides a useful basis for a long-term satisfactory purchase decision.


  1. What is a cordless phone?
  2. What to look out for when buying a cordless phone?
  3. How does a cordless phone work?
  4. The advantages and disadvantages of a cordless phone
  5. Figures, data and facts about cordless phones
  6. What connections does a cordless phone have and what are they for?
  7. This is the best way to set up the answering machine of a cordless phone
  8. Tips for increasing speech quality
  9. This is how a cordless phone is disposed of safely and in an environmentally friendly manner
  10. This is how the data transfer runs on a cordless phone
  11. Installation of a cordless phone
  12. Numbers, data and facts about the cordless phone
  13. When buying a cordless phone you should pay attention to this
  14. Grundig cordless phones
  15. Philips cordless phones
  16. Doro Phone Cordless phones
  17. Gigaset cordless phones
  18. Panasonic cordless phones
  19. Cordless phone – these types exist!
  20. AB correctly set up on cordless phone
  21. History of cordless phones – since when do we use cordless phones?
  22. The 5 most common problems with a cordless phone – and how to solve them
  23. Disposal of cordless phones in an environmentally friendly manner – guidelines and tips
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