Capacity For Lines/Trunks; Capacity For Extensions - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

Planning Module Placement
This section contains instructions for each of these tasks.
For information about calculating unit load requirements, see Appendix F, "Unit
Load Calculation."
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 system's
capacity for lines/trunks according to the system's 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 modules have one or two power-failure transfer (PFT)
jacks used to connect a single-line telephone in case of a power failure and not
counted in system capacity.
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Control Unit Configuration