AT&T MERLIN LEGEND Release 3.1 System Manager's Manual page 21

Release 4.0 Enhancements
New maintenance procedure for testing outgoing trunk problems
A password is now required for technicians to perform trunk tests.
!
Release 4.0 Enhancements
Release 4.0 includes all Release 3.1 functionality plus the enhancements listed
below:
Support for up to 200 stations
Release 4.0 has an expanded dial plan that supports up to 200 tip/ring
devices.
New 016 tip/ring module
This new module supports the 200 station dial plan by providing sixteen
ports for tip/ring devices. Applications that use a tip/ring interface can
connect to this board. All sixteen ports can ring simultaneously. Four
touch-tone receivers (TTRs) are included on the module as well. The
module's ringing frequency (default 20 Hz) can be changed through
programming to 25 Hz for those locations that require it.
Support for National ISDN BRI Service
This service provides a low-cost alternative to loop-start and ground-start
trunks for voice and digital data connectivity to the Central Office. Each
of the two B (bearer)- channels on a BRI line can carry one voice or one
data call at any given time. The data speeds on a B-channel are up to
14.4 kbps for analog data and up to 64 kbps for digital data, which is
necessary for video conferencing and other video applications. Release
4.0 supports the IOC Package "S" (basic call handling) service
configuration and Multi-Line Hunt service configuration on designated
CO switches.
New 800 NI-BRI module
This new module connects NI-1 BRI trunks to the MERLIN LEGEND
system for high-speed data and video transmission.
Security Alert:
The enhancements in Release 3.1 help increase the security of the
MERLIN LEGEND System. To fully utilize these security
enhancements, be sure to read and understand the information in
these upgrade notes.
System Manager's Guide
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