Lucent Technologies MERLIN LEGEND Release 6.1 Installation Manual page 30

MERLIN LEGEND Communications System Release 6.1
Installation 555-661-140
Prior Releases Features and Enhancements
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.
Issue 1
August 1998
Page xxxi