Lucent Technologies MERLIN LEGEND Release 6.1 System Manager's Manual page 92

MERLIN LEGEND Communications System Release 6.1
System Manager's Guide 555-661-118
3 System Components
Control Unit
Each module has a label that contains its name. As noted in Chapter 2, "About the
System," the names of the modules identify their capacities and capabilities. The
first digit indicates the number of line/trunk jacks a module supports, while the last
two digits describe the number of extension jacks it supports. Following the
number may be letters that indicate the type of trunk or trunks it supports; for
example, LS for loop-start and GS for ground-start . A line/trunk module name with
no letter following it supports loop-start trunks. The following are examples of
module names:
The 408 GS/LS MLX module provides four trunk jacks supporting
ground-start and/or loop-start trunks, and eight MLX extension jacks.
The 016 (T/R) module (Release 4.0 and later only) provides 16 extension
jacks that, in this case, supply tip/ring (T/R) connections for single-line
telephones, modems, voice messaging systems, and other components.
The balance of this section presents some specific information about the modules
that connect extensions and the modules that connect lines/trunks.
and Table 3–1
Modules Supporting Extensions
Table 3–1
section highlights some important points about extension modules.
NOTE:
Extension jacks connect to individual telephones and to adjuncts that are
attached to extensions. Some adjuncts and applications serve the whole
system and connect directly to line/trunk jacks.
Extension Jacks
While the jacks that support MLX extensions and the jacks that support analog
extensions may look the same, there is a major difference: an MLX extension jack
actually supports two extension numbers at each location served by the jack.
When you use an adapter called a Multi-Function Module in an MLX telephone,
you can connect a T/R device (for example, a modem, fax machine, or answering
machine) to that telephone. Even though a single extension jack on the module
serves both the phone and the T/R device, each device has its own extension
number and operates independently. In contrast, if you want to use both an
analog multiline telephone and a modem (or other adjunct) at the same location in
the system and give each one its own extension number, you must use two
physical extension jacks on the module.
The Voice Announce to Busy feature, which allows a telephone user to hear a
voice page (also called a voice-announced call ) while on another call, has the
same requirements as an adjunct that operates independently from the phone:
one extension jack (and no adjunct) for an MLX phone; two extension jacks for an
present summary information.
describes the type of equipment that each module supports. This
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Issue 1
August 1998
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Figure 3–3
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