Type
The type of phone primarily determines its purpose and features:
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Stationary telephone. Also known as the landline phone.
It is the classic “home phone” which is most often installed in apartments for private use. This can be either a simple device with only purpose of making and receiving calls, or more complex device packed with features like display and an electronic notebook, a modern digital answering machine, a caller ID feature, etc.
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System phone. More complex and multifunctional devices that can programme office mini-PBXs, organize conferences, switch incoming calls to internal network numbers, etc. Such devices are most often used in large offices.
Amount of numbers in memory
The maximum amount of phone numbers that a user can store in the phone's memory. To make a call to one of these numbers, you do not need to remember complex combinations of numbers, just select the desired contact and press the call button. Usually, the numbers that you have to use most often are stored in memory: numbers of family members, friends, etc.
Wall mounting
The design of these phones provides the possibility of vertical
mounting of the device on the wall. Usually, models of this type are more compact in size, have a long cord, and in some cases also have keys on the handset.