The type of phone primarily determines its purpose and features:
—
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.
—
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.
Caller ID is a feature
of automatic identification of the caller's number. As soon as the phone receives an incoming call, this feature will immediately show the caller's number on the display, allowing the user to know who is calling even before he accepts the call. But at the same time, there is one nuance that many people omit: when you request a number from the PBX, the phone immediately establishes a connection, that is, from the same minute, the billing of the call begins for the subscriber at the other end of the wire.
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.