Distributed Communications System (DCS)

If you plan to use DCS in a network of Communication Manager where UCIDs are tracked, you must configure DCS with ISDN or SIP trunks having the shared UUI service protocol. Otherwise, calls handled through one of the DCS features, such as DCS Coverage, do not retain the UCID initially assigned to the call.

Remote Messaging System

For a remote messaging system over DCS, configure the DCS trunks used to accomplish the remote messaging system operation as described in Distributed Communications System to retain the UCID associated with a call.

Tandem Calls

When a tandem call is made through Communication Manager, you can choose to pass or block the UCID information through the tandem Communication Manager. To pass a UCID through a tandem Communication Manager, configure both the incoming and outgoing trunks at the tandem Communication Manager to handle UCIDs. For proper private and public network information forwarding administration, see Information Forwarding.