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.
Display
The presence of the
display improves the usability of the phone. On the one hand, it is much more convenient to dial the desired number on such a device, since all numbers are displayed on the screen, which reduces the possibility of error. Also using the phone book feature is more convenient if there is a screen. On the other hand, the automatic number identification feature simply cannot be implemented on a phone without a display.
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.
Speakerphone
Hands-free mode allows you to have a conversation with the person on the other end of the wire, without picking up the phone for this and not looking up from other activities. For this, a speaker and a microphone built directly into the phone case are used.
Number of telephone lines
The number of telephone lines directly determines how many different telephone numbers can be "attached" to the device. Support for two or more lines can be a good solution for users who want, for example, to receive business calls on one number and personal calls on the second, but at the same time use only one telephone set. Each of the numbers in this case will have its own ringtone.
