Advanced Phone Features754. Select the desired line from the Account ID field.5. Enter the remote extension number in the Value field.6. Press the Save soft key to accept the change or the Back soft key to cancel.You can also configure an intercom key via web user interface at the path Phone->DSSKeys.To place an intercom call:1. Press the intercom key when the phone is idle.The phone is automatically connected to the extension specified in the Value field.2. Press the intercom key again or the Cancel soft key to end the intercom call.By default, the SIP-T28P IP phone supports to answer an incoming intercom callautomatically. The phone automatically plays a warning tone when it receives anincoming intercom call. In addition, you can enable the phone to mute the microphonewhen it automatically answers an incoming intercom call. You can also enable thephone to automatically answer an incoming intercom call while there is already anactive call on the phone, the active call is placed on hold.Intercom features you need to know:Intercom features DescriptionIntercom Allow Allows you to enable or disable the IP phone toautomatically answer an incoming intercom call.Intercom Mute Allows you to enable or disable the microphone onthe IP phone for Intercom calls.Intercom Tone Allows you to enable or disable a warning tone whenthe phone receives an incoming intercom call.Intercom BargeAllows you to enable or disable the IP phone toautomatically answer an incoming intercom callwhile there is already an active call on the phone.