Some of the phones attached to the telephone system may be able to connect calls without the user having to lift the handset or press any buttons. This is called 'auto-answer'.
Whilst auto-answer is not supported by analog phones, you can still make calls to phones that support auto-answer:
•Direct Voice Calls
Make a call direct to another extension. If auto-answered, this creates an immediate two-way call between you and the other extension.
Make a call to a group of extensions. Those extension that support auto-answer will hear your speech though you will not hear them.
In addition to phone's that support auto-answer, an external loudspeaker system can be connected to the system.