Capacity For Lines/Trunks; Capacity For Extensions - Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
2 Control Unit Configuration
Planning Module Placement
For detailed information about modules and their specifications (including
line/trunk and extension capacity), see the descriptions of hardware components
in the Equipment and Operations Reference.
Forms Needed
Equipment List (if available)
Form 1, System Planning

Capacity for Lines/Trunks

Line/trunk capacity is the number of lines/trunks that can be connected to the
control unit. This section contains instructions for calculating the systems capacity
for lines/trunks according to the systems module types.
Planning Form Instructions
1. In the table under the Line/Trunk Capacity section of Form 1, System
Planning, fill in the number of each type of line/trunk module on the
appropriate line of the Number of Modules column.
2. Add the column and record the result at the bottom of the column on the
System Totals line.
3. For each module type noted, multiply the value in the Number of Modules
column by the value in the Trunks Supported by Module column; write the
results on the appropriate row under Total Trunks by Module Type.
4. Add the column and record the total line/trunk capacity of the system at the
bottom of the column, on the System Totals line.

Capacity for Extensions

Extension capacity is the number of extensions that can be connected to the
control unit. In most cases, the number of physical jacks on the modules indicates
capacity. Most loop-start and ground-start modules have one or two power-failure
transfer (PFT) jack used to connect a single-line telephone in case of a power
failure and not counted in system capacity. Every four line jacks has one
associated PFT jack.
One extension number is automatically assigned to each extension jack, whether
or not equipment is connected to it, except for the 008 MLX, 408 GS/LS-MLX, and
008 OPT modules:
008 MLX and 408 GS/LS-MLX Modules. Two extension numbers are
assigned to each physical jack: the first for an MLX telephone and the
second for any equipment connected to the telephone through an MFM,
ISDN terminal adapter (such as the Ascend Pipeline 25 or 50), or any 2B
data desktop video endpoint.
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Issue 1
June 1997
Page 2-2