The Two-way Intercom feature has similar functionality and activation logic as the One-way Intercom, with the added capability of bidirectional communication (with both send and receive paths) automatically using the speaker and microphone facilities at the destination.
As for One-way Intercom, a Lotus Sametime Unified Telephony subcriber can originate a 2-way Intercom Call to another member of his/her Community Group
by dialing an access code and the destination's Community Group member number or via a programmed repertory dial key (Fixed 2-way Intercom
OScAR-Pro (Lotus Sametime Alarm and Response - Professional) Intercom calls are not applicable to Intercom Community Groups. OScAR-Pro can make an intercom call to any Lotus Sametime Unified Telephony subscriber (device-speaker/mic eqipped or reverts to normal call).
For a Two-way Intercom call, if provisioned, the terminating Lotus Sametime Unified Telephony lets the Media Server provide a periodic tone as shown in the example figure below. When the intercom call is disconnected, Lotus Sametime Unified Telephony clears the Media Server connection.
Figure 1. Two-way Intercom periodic tone
Feature Access Code
In order to invoke 2-way Intercom, a Prefix Access Code for the Vertical Service Two-Way Intercom
has to be created in the appropriate numbering plan(s).
Parent topic: Intercom / Speaker Control