Aastra Telecom 53I, 55I, 57I, 57I CT Use the following procedures to configure Intercom calls on the IP phone.

Operational Features
41-001160-00, Release 2.1, Rev 04 5-63
Configuring Operational Features
Operational IP Phone Features
Use the following procedures to configure Intercom calls on the IP phone.
Configuration Files
For specific parameters you can set in the configuration files for outgoing Intercom, see Appendix A, the
section, “Outgoing Intercom Settings” on page A-121.
For specific parameters you can set in the configuration files for incoming Intercom, see Appendix A, the
section, “Incoming Intercom Settings” on page A-123.
Aastra Web UI
Outgoing intercom settings (55i, 57i, and 57i CT only):
1 Click on Basic Settings->Preferences->Outgoing Intercom Settings.
2 Select an Intercom type for outgoing Intercom calls from the Type list box.
Valid values are Phone-Side, Server-Side, Off. Default is Off.
3 If Server-Side is selected, enter a prefix to add to the phone number in the "Prefix Code" field.
Note: For Sylantro servers, enter *96.