Lucent Technologies MERLIN LEGEND 6 - Manual (Page 89)

MERLIN LEGEND Communications System Release 6.0
System Manager’s Guide
555-660-118
Issue 1
February 1998
System Components
Page 3-7 Control Unit
3
Lucent Technologies technicians to install ring generators. If your 008 or 012
module has a ring generator, either added or built-in, you should see a label on
the front of the module telling you that the ring generator is included.
Also, 016, 012, and 008 modules allow the connection of T/R devices directly to
the control unit, without the need for a telephone and adapter at an extension. You
can use them to hook up fax machines or PCs with modems, for example. For
more information, see
“Adjuncts” on page 3–36 .
NOTE:
The MERLIN LEGEND Mail
®
Voice Messaging System integrates a T/R
module (007 MLM) with a voice messaging system and is both a module
and an application.
Modules Supporting Lines/Trunks 3
Table 3–1 summarizes the modules that support lines/trunks. This section
describes a few module features and modules that need additional explanation.
NOTE:
Modes of operation affect features and hardware. For example, Direct
Inward Dial is supported only in Hybrid/PBX mode, so if your system uses
a different mode of operation, you do not need a DID module. For more
information about modes, see Chapter 2, “About the System.”
Power-Failure Transfer Telephones 3
When your system was planned, the Lucent Technologies representative(s) made
sure that you had a module to support one or more power-failure transfer (PFT)
telephones. These telephones, which are connected to a special line/trunk jack,
allow you to make and receive calls during a commercial power failure. They do
not affect the capacity of the modules.
100D Module 3
The 100D module has only one line/trunk (called a Digital Signal Level 1 or DS1
facility) but actually supports 23 or 24 “virtual” lines/trunks. These are called
channels or B-channels, depending upon the type of service you choose. As
described in Chapter 2, “About the System,” you can program the DS1 facility to
provide either T1 or Primary Rate Interface (PRI) service on the 100D module.
NOTE:
The 100D module is not available in Behind Switch mode.