Instruction manual

MERLIN LEGEND Communications System Release 5.0
System Planning
555-650-112
Issue 1
June 1997
Unit Load Calculation
Page F-6
F
† The MFM has its own wall power unit located at the telephone and therefore is not added to the
unit load calculation.
‡ Up to two DSSs (one DSS for each MLX-28D or MLX-20L) can be powered from each control
unit carrier. For example, a three-carrier system can have six system operator positions, each
with one DSS powered from the control unit.
7. Try to exchange modules between carriers to reduce the unit loads to 54 (if
a 391A1 or 391A2 power supply is installed) or 75 (if a 391A3 power supply
is installed). (Remember that the 100D, 800 NI-BRI, 400, 400 GS/LS, 800,
and 800 GS/LS modules have unit loads of 0.0.) Repeat Steps 1 through 6
to recalculate unit loads for the new configuration.
NOTES:
Empty slots are not permitted between modules.
■
If the exchange reduces the unit load to below the rated maximum for
your power supply module, no further calculation is required.
■
If the exchange does not reduce the unit load to 54, replace the 391A1
or 391A2 power supply with a 391A3 power supply. If your system has
a 391A3 power supply and the exchange does not reduce the unit load
to 75, continue to Step 8.
8. Calculate the unit load for slots 5 and 6 of the carrier.
■
If the unit load for slots 5 and 6 is less than or equal to 27, power is suf-
ficient for the carrier.
■
If the unit load for slots 5 and 6 is more than 27, continue to Step 9.
Module Qty x Unit Load = Total
Equipment
Hybrid/PBX
or Modified
Key
Optional Equipment
†
Direct Station Selector
‡
0.7 0.9
General-Purpose Adapter 0.8 1.0
Hands-Free Unit 0.8 1.0
Headset Adapter 0.8 1.0
EICON board 0.0 0.0
Total Actual Unit Load