Lucent Technologies 555-661-140 manual Group Calling Enhancements

MERLIN LEGEND Communications System Release 6.1	Issue 1
Installation 555-661-140	August 1998
Prior Releases Features and Enhancements	Page xxxi
Release 6.0 Enhancements (February, 1998)

trunks in cases where the distance between networked systems is great enough to distort signals, but the service provider does not supply switching services.

—You can tailor your use of PRI B-channels with drop-and-insert equipment that allows fractional use of T1 channels for non-MERLIN LEGEND data/video communications between sites, while keeping the remaining T1 channels for PRI voice or data traffic.

NOTE:

The 24th T1 channel must not be dropped before reaching the MERLIN LEGEND Communications System because MERLIN LEGEND uses the 24th channel as the PRI D-channel or signalling channel.

— You can tailor your use of T1 channels to support a mix of T1-emulated tandem tie trunks for voice or data communications at 56 kbps per channel, allowing 2B data transfers at 112 kbps. The system also allows fractional use of point-to-point T1 tandem trunks with drop-and-insert equipment.

■Voice Mail and Auto Attendant. Networked systems should have their own local voice mail and/or auto attendant applications as well as their own external alerts and Music On Hold sources. However, a single auto attendant can transfer calls throughout the network. It can answer only those calls that arrive on the PSTN facilities of the system where it is connected. Chapter 1 in Network Reference includes an example of this configuration.

Although many features are available using tie trunks for network connectivity, PRI tandem trunks provide greatly enhanced features and faster call setup. For this reason, PRI is recommended over tie functionality in private networks.

Group Calling Enhancements

Release 6.0 and later systems include Group Calling features that enhance group calling operations.