InterCom Calls, also known as Speaker Control Calls (1-way and 2-way), are used for many applications such as Medical Centers, Executive/Assistant arrangements, automotive industry, chemical and energy sector, emergency response centers, and by OScAR-Pro (Lotus Sametime Alarm Response - Professional, formerly known as DAKS). For Intercom calls, the speaker (and microphone) on the destination device is automatically turned on when the call is connected.
Since 22.214.171.124, Lotus Sametime Unified Telephony supports Intercom functionality over SIP-Q and locally. This includes:
One-way Intercom, variable and fixed (i.e. invoked via repertory dialing)Note:
Two-way Intercom, variable and fixed (i.e. invoked via repertory dialing)
This feature is non-standard, i.e., based on proprietary CorNet-N and NQ, and will not interwork with ISO/IEC or ECMA standard implementations.
Intercom Features are accessible from idle, dial, talk, and consultation dial states. Lotus Sametime Unified Telephony delivers an Intercom Call to an idle destination.
When the intercom caller or called party is not provisioned for Intercom correctly or the called party disallows an Intercom call from the calling party, the Intercom call will fail. The caller may re-dial the called party normally to speak with that user. If the called partie's device is not equipped with automatic intercom facilities, the call reverts to a 2-party normal call.
SIP devices supporting Intercom are restricted to OpenStage models and Lotus Sametime PE (Personal Edition) clients (when equipped with an intercom speaker and microphone).
Devices that do not support intercom calling deliver a normal basic call when terminating a speaker call.
Shared keyset lines cannot be used for Intercom
A 'rejection' key used to close a speaker call is not supported
Network-wide members in survivability mode can not access this feature
The primary scenarios where Intercom is required:
Executive is able to push a phone key and give a message to the Assistant
Alarming Application Environment
The Intercom Feature can be used to make alarm announcements (e.g. via DAKS).
Several feature interactions are blocked at both the originating and terminating user. Interworking includes the capability for an incoming call to indicate override (e.g., CF, DND). Intercom depends on that capability, for example, when the destination has activated Call Forwarding or Do Not Disturb.
One-way IntercomParent topic: Mobility and Collaboration
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.
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.
Community Groups are used to configure bilateral Intercom Calling capabilities and to provide fast dialing for Intercom Calls.
Intercom: OScAR-Pro Support
Lotus Sametime Unified Telephony can distinguish between OScAR-Pro ( Alarm and Response - Professional, formerly known as DAKS) and subscriber Intercom Calls. If an Intercom Call originates at OScAR-Pro, it shall be delivered to the idle called subscriber without restrictions. In particular, the called party's Community Group is ignored.
How to Provision System-wide Intercom Settings
This procedure describes how to configure Intercom settings at the system (i.e. switch) level.