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MERLIN LEGEND Communications System Release 6.0
System Programming
555-660-111
Issue 1
February 1998
Programming Procedures
Page 4-166PRI Facilities
4
NOTE:NOTE:NOTE:
If you are adding PRI facilities to an existing system, certain values must be
set correctly. To inspect or change these values, see “DS1 Facilities” on
page 4–87. Do not start these procedures until you have checked the
following:
■ Type of DS1 Facility must be set to PRI.
■ Frame format must be specified correctly.
■ Zero code suppression must be specified correctly.
■ Clock synchronization source must be set to loop (derived from the
T1 line).
The settings for frame format and zero code suppression must be consistent with
the options selected when the PRI connection was ordered.
If you are using ARS in connection with PRI, make sure you select voice, data, or
voice and data, as appropriate, when you perform the ARS “Voice and/or Data
Routing” procedure found in “Automatic Route Selection.”
Switch Type 4
In Release 4.2 and later systems, use this procedure to specify the PRI
connection through the following switch types:
■ 4ESS
■ 5ESS
■ Nortel DMS-100 BCS 36 for local exchange carrier services
■ Nortel DMS-250 serving the MCI network
■ Digital Switch Corporation DEX600E serving the MCI network
In Release 6.0 and later systems, two additional switch types allow you to specify
additional switch options in order to set up a PRI tandem trunk that connects two
MERLIN LEGEND Communications Systems or a MERLIN LEGEND
Communications System and a DEFINITY Communications System. The two
additional options are the following:
■ Legend-NTWK
■ Legend-PBX
To set up a PRI tandem trunk, one system is specified as operating in PBX mode
and the other as operating in network mode. When you program this switch type,
you specify the type of switch at the
other
end of the PRI trunk, not the local
switch. The slot number that you enter is the slot number on the local system.