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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Feature Interactions
Page 3-9Coverage
3
Coverage 3
In Release 6.0, calls arriving for extensions at one system cannot be covered by
extensions or calling groups on a non-local system.
For Release 6.0 and later systems, non-local dial plan calls are treated as outside
calls by the system and by Selective Coverage features: Coverage Inside and
Coverage VMS Off.
In Release 6.1 and later, the Group Calling feature is enhanced to allow a calling
group to have a single non-local member that is used to route calls to a remote
system. A calling group containing a single non-local member can be used for
many of the same purposes as a calling group containing only local extensions.
This includes Group Coverage across a private network to a centralized VMS/AA,
non-local calling group, QCC queue, DLC, or any individual extension on a remote
MERLIN LEGEND, DEFINITY ECS or DEFINITY ProLogix system, or to the
PSTN via UDP routing.
To ensure that VMS/AA calls transferred across the private network have time to
go to coverage if not answered, it is recommended that group coverage ring delay
for each sender be set to three rings or less.
Digital Data Calls 3
Digital data calls between networked systems must travel over PRI tandem trunks
or T1-emulated tie trunks programmed for data. 2B data is supported when two
B-channels or T1 channels are available. UDP routes for digital data calls over
tandem PRI trunks can specify voice and data or data only service. UDP routes
for pools of T1-emulated tie facilities must specify data only. On tandem PRI
facilities, 128-kbps 2B data speeds are supported. T1-emulated tie trunks
programmed for data support 112-kbps 2B data speeds.
If you are using fractional point-to-point T1 facilities as tandem tie trunks, you can
program some channels for data-only; remaining channels can be dedicated to
voice only.