Aastra Telecom SIP 57I - Manual (Page 270)

Operational Features
5-60 41-001160-00, Release 2.1, Rev 04
IP Phone Administrator Guide
Operational IP Phone Features
Incoming/Outgoing Intercom with Auto-Answer and Barge In
The Intercom feature allows you to press the configured Intercom button on the IP
phone 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).
You can configure incoming and outgoing intercom calls on all phone models. A
User can configure incoming intercom calls only.
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. Only an Administrator can configure outgoing intercom calls.
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.
For outgoing intercom calls, an administrator can configure the following
parameters:
Configuration File Parameters Web UI Parameters
• sip intercom type • Type)
• sip intercom prefix code • Prefix Code
• sip intercom line • Line
Note: To configure outgoing intercom calls using these parameters, see
“Configuring Intercom Calls Settings” on page 5-62 .