The One-way Intercom feature provides an authorized originating party the capability to initiate an Intercom Call automatically with a 1-way connection (send path only from the originator) to a local destination, another Lotus Sametime Unified Telephony or a destination located over SIP-Q.
a Lotus Sametime Unified Telephony subcriber can originate a 1-way call to another member of his/her Community Group
- an access code and
- the destination's 1- or 2-digit index number within his/her Community Group
or via a programmed repertory dial key (Fixed 1-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).
Once the Intercom Call is established, the caller's voice or announcement is broadcast through the speaker for all in hearing distance to hear. The caller goes on-hook and the call clears without the destination communicating back to the caller.
Tones and Audio Path Safeguarding
For One-way Intercom calls originated by a Lotus Sametime Unified Telephony subscriber, an initial tone is provided as illustrated in the example figure below.
Figure 1. One-way Intercom zip tone
The conference circuit at the originating side is retained during the call in order to prevent the calling party from receiving audio from the called party.
The system-wide Terminating Intercom Control
parameter specifies whether Lotus Sametime Vocie shall safeguard terminating
One-way Intercom Calls in a similar fashion. It is implemented as follows:
On (default setting)
The Lotus Sametime Unified Telephony creates a(nother) conference circuit at the terminating side to prevent the called party from sending audio to the calling party.
The switch of the terminating subscriber shall not create a MS conference circuit to control the speech path for 1-way intercom calls.
This may be used to conserve limited Media Server resources, e.g. when OScAR-Pro sends broadcast messages via 1-way intercom calls to multiple subscribers.
Currently OScAR-Pro only supports Two-way Intercom, so One-way Intercom calls are either Lotus Sametime Unified Telephony-local and inter-Lotus Sametime Unified Telephony.
Feature Access Code
In order to invoke 1-way Intercom, a Prefix Access Code for the Vertical Service One-Way Intercom
has to be created in the appropriate numbering plan(s).
Parent topic: Intercom / Speaker Control