Networking Capabilities - AT&T MERLIN LEGEND Installation & Maintenance Manual

System Description

Networking Capabilities

The system can connect to another system via the two CUs or
via the tie trunks.
Control Unit to Control Unit
This system's CU can connect to another system's CU in three
ways:
from an off-premises telephone (OPT) line to an LS line/trunk
(or vice versa) via analog facilities
via an analog tie trunk (400EM module)
via a digital tie trunk using emulated E&M in the T1 mode on a
100D module. A back-to-back connection from one DS1
facility to the other can be used when the total cable distance
is fewer than 1300 feet.
OPT/LS Connection
A 008 OPT module on system A's CU can be connected to an LS
port on system B's CU. This enables the user on system B to
access all the stations and facilities on system A. If system B has
Remote Access, the user on system A can directly access
stations and facilities on system B without operator intervention.
Conversely, an LS port on system A can be connected to an OPT
port on system B.
Note: If the systems are on the same premises, the connection
can be made to any T/R port.
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