Lucent Technologies MERLIN LEGEND Release 6.1 Feature Reference page 726

MERLIN LEGEND Communications System Release 6.1
Feature Reference 555-661-110
Features
Tandem Switching
these calls can be routed across the network to another system's public
switched telephone network PSTN trunks. For equal access calls, the
system automatically prepends the local ARS access code, which must
match the ARS code of the non-local system.
!
At the system where calls originate, use one or more ARS tables for routing
network calls. The type of table required depends upon how users in your
system will employ networked lines. Typically, you might need an Area
Code table. For example, if the remote system is in the 617 area code and
your local system is in the 908 area code, the Area Code Table that you set
up might include the entry
All tables that specify tandem trunk pools must prefix the ARS access code
of the remote system.
For all fully programmable ARS tables, ARS tables 17 & 18, Dial 0 table,
and Special Numbers table, the Remote Access code must not be
programmed in the prepended digits attributes table of each table.
At the system where calls are delivered to the PSTN, digit manipulation
may also be required. In the example above where calls are routed from
the 908 area code to the 617 area code, the system in the 617 area code
absorbs
send calls to yet another networked system. It may be necessary to add or
absorb digits for further routing. For more information refer to Network
Reference .
At the system where calls originate, set up the subpatterns for the table. In
doing so, you may wish to check with the non-local system manager to
ensure that the local system routes associated with the primary time period
(sub-pattern A) take advantage of non-local system routes associated with
the secondary time period (sub-pattern B). If the non-local system is in a
different time zone from your own, you may need to take this into
consideration as well. For more information refer to Network Reference .
At the system where calls originate, assign appropriate FRLs to the routes
and to the extensions that will use the networked lines. Factory settings do
not restrict toll calls. At the system where calls reach the PSTN, assign an
FRL to the default COR for the type of tandem trunk (non-tie for PRI and tie
CAUTION:
Unless networked systems are collocated, each system should have
at least one loop-start line connected to the PSTN. The line is
required to allow connection of a power-failure telephone to the
Power-Failure Transfer (PFT) jack on a module as a power outage
backup and for correct routing of emergency and other N11 calls. To
ensure that the correct services are reached, if the loop-start line is
used for emergency or other N11 calls, it should be assigned to the
main pool. In this case, IXC calls determine the number of loop-starts
required. Refer to Feature Reference guide for details on the PFT
feature.
. ARS tables can be used, under some circumstances, to
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Issue 1
August 1998
Page 677