Lucent Technologies 555-230-024 manual Multimedia Call Handling

Features

For an incoming call, Early Answer answers the dynamic service-link calls when the destination endpoint answers, unless Early Answer is specified during routing or termination processing.

NOTE:

The “destination voice endpoint” might be an outgoing voice trunk if the destination voice station is forwarded or covered off-premises.

Multimedia Call Handling

Multimedia Call Handling allows you to administer a telephone and a multimedia endpoint as a multimedia complex. Through this multimedia complex, users can place voice or video calls using a single number. They can conduct video confer- ences, and they can forward, cover, hold, or park multimedia calls much as they would standard voice calls.

The multimedia complex handles calls that conform to the H.320 suite of protocol standards. These standards allow video-conferencing systems from different vendors to communicate. An H.320 call can contain voice, video and data. The capabilities of individual multimedia-endpoint packages may vary.

Multimedia data conferencing (T.120) via ESM

The data conference is controlled by an adjunct device called an Expansion Services Module (ESM). The Expansion Services Module is used to terminate T.120 protocols [including Generalized Conference Call (GCC), a protocol standard for data conference control] and provide data conference control and data distribution. The MultiMedia Interface circuit pack, TN787, is used to rate adapt T.120 data to/from the ESM.

The ESM represents an existing piece of equipment connected to the switch in a new way. The ESM itself is built on a MAP40 PC platform, connected to the DEFINITY switch via a PRI link. The link terminates on a new switch-resident PRI board (TN 2207), which is modified from a standard PRI board with provisions for cable interconnection to a switch-resident TN787 MMI board. The MMI operates in the “ESM mode”, and serves to rate-adapt the T.120 data stream from a service link to the full bandwidth of a PRI B-channel. The cable carries the adapted data stream over to the PRI link, which carries the information out to the ESM proper.

The ESM is connected to the switch via an E1/T1 PRI link “front-ended” by an MMI operating in a special ESM interface mode. The ESM MMI provides rate adaption between the data subchannel of each endpoint’s H.221 protocol stream and a PRI B-channel to the ESM.

A-42Issue 5 January 1998 555-230-024