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Operational Features
5-112 41-001129-00 Rev 09, Release 1.4.1
IP Phone Administrator Guide
Operational Features
Incoming/Outgoing Intercom with Auto-Answer
(Intercom applicable to 480i/480i CT only)
The Intercom feature on the IP phones allows you to press the Icom button
(]) and then enter the number you want to call to initiate an intercom
call. Intercom calls can be controlled either locally (phone-side) or by the SIP
server (server-side).
Outgoing Intercom Calls
On outgoing intercom calls, an available unused line is found when the Icom
button is pressed. Since this line has no configuration, the phone applies an
existing configuration ("Outgoing Intercom Settings", Line, default is Line 1) to
this line in preparation for placing the intercom call. For example, an outgoing
intercom call can use the configuration of line 1 but places the actual intercom call
using line 9.
A phone-side Intercom call indicates the phone is responsible for telling the
recipient that an intercom call is being placed, while a server-side intercom call
means the SIP server is responsible for informing the recipient. Server-side calls
require additional configuration of a prefix code. After pressing the Icom button
and entering the number to call, the phone automatically adds the prefix to the
called number and sends the outgoing call via the server.
Incoming Intercom Calls
On incoming intercom calls, you can enable (turn ON) or disable (turn OFF) the
microphone on the IP phone. You can also enable or disable auto-answer. If
auto-answer is enabled on the IP phone, the phone plays a tone to alert the user
before answering the intercom call. If auto-answer is disabled, the phone rejects
the incoming intercom call and sends a busy signal to the caller. By default, the
microphone is disabled and auto-answer is enabled.
Note: Auto-answer is applicable to all IP phone models, but the Intercom
feature is applicable to the 480i and 480i CT only.