MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 521Primary Rate Interface (PRI) and T1
programmed (and the service subscribed to), Release 2.0 and later systems send
a systemwide base number of up to 12 digits, of which the final digits (up to 4
digits) are replaced with the number of the extension from which the call was
made. For example, a call made from extension 7104 with a systemwide base
number of 908-555-7000 sends the number 908-572-7104. For facility-to-facility
calls where there is no call-originating extension (for example, Remote Call
Forwarded calls), the systemwide base number is substituted. However,
trunk-to-trunk transfer results in a CPN that consists of a base number in which
the last digits are replaced by the number of the transferring extension.
In some instances, the systemwide base number is not sufficient to cover all
extension numbers in the system. For example, the base number might be
908-555-7000 and there might be a group of extensions, 7000 through 7099, that
correspond to telephone numbers from 908-555-7000 to 908-555-7099; there
might be another group of extensions numbered 300 through 399 whose
telephone numbers are 908-555-0300 through 908-555-0399. In a case like this,
there is no base number that can cover all of the extensions so that the number
sent is the correct number for the extension.
In Release 4.2 and later systems, the MERLIN LEGEND Communications
System’s PRI support for calling party identification extends to MCI and local
exchange (DMS-100) subscription services.
T1 Programming Options 36
DS1 facilities programmed as T1 lines/trunks can supply many types of
connections. T1 service transmits and receives voice and analog data as well as
digital data in Release 4.0 and later communications systems. The connections
can be to the PSTN, or they can be tie trunks connected to other MERLIN
LEGEND Communications Systems or other PBX systems.
T1 Switched 56 channels connected to the PSTN can use routing by dial plan to
send incoming calls to the correct data extension.
T1 Tie Trunk Connections 36
T1 trunks can be used to supply digital-emulated, tie trunk connections. These
trunks can connect two MERLIN LEGEND Communications Systems or can
connect one MERLIN LEGEND Communications System to another type of PBX
(for instance, a Lucent Technologies DEFINITY G1.1 or DEFINITY ECS) or to the
central office with digital (Switched 56 kbps) connections. In Release 6.0 and later
systems, both T1-emulated voice tie lines and T1 Switched 56 tie lines can be
used as tandem trunks to link MERLIN LEGEND Communications Systems with
one another or with DEFINITY ECS or DEFINITY ProLogix Solutions
communications systems.
Tie trunk settings for these connections are similar to standard analog tie trunks.
The only difference between setting up a digital-emulated, tie trunk and an analog
tie trunk is that the Signaling Type setting (Type 1 Standard, Type 1 Compatible,
Type 5 Simplex) is not meaningful.
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