- Intercom is a phone feature and not a user feature. If a user has accounts (lines) on more than one phone, dialing the intercom prefix and the user's extension will fork the call to all those phones. However only the phones in intercom-enabled group will attempt automatic pick-up and of course only one of those phones will ultimately establish connection. Because of this, Intercom is not suitable for "shared" users.
- You can manually configure other phone types as Intercom phones if they support Alert-info header. Press Advanced Settings to display and optionally change the value of Alert-info parameter. sipXconfig will use that value when generating dial rule corresponding to configured Intercom prefix.
- If you have multiple sipXcom clusters and you wish to allow Intercom to work between them, ensure that the 'Alert Info' value is the same on both systems.