Intercom allows us to force the IP phones to answer a call sent to the group and have bidirectional communication.
To set this feature, we must first enable it in the PBX Configuration | Feature Codes menu. In this page, we change from Disabled to Enabled all the feature codes related to the intercom, and save and apply the changes. This is shown in the following screen:
Here is an example of usage:
*80nnn: Intercom extension
nnn.*54: Enable all extensions to intercom you (except those explicitly denied).
*54nnn: Explicitly allow extension
nnnto intercom you (even if others are disabled).*55: Disable all extensions from intercomming you (except those explicitly allowed).
*55nnn: Explicitly deny extension
nnnto intercom you (even if generally enabled).