(Hybrid/Pbx Mode) - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

Unit Load Calculation
4. Hybrid/PBX mode only:
Calculate the total number of MLX and analog
multiline telephones.
Number of MLX-20L telephones connected to
modules in the carrier:
Number of MLX-28D telephones connected to
modules in the carrier:
Number of 34-button analog multiline telephones
connected to modules in the carrier:
Total of MLX-20L, MLX-28D, and 34-button analog
telephones
5. Calculate the estimated unit loads.
Module
008
008 MLX
008 OPT
012
016
100D
400
400 EM
400 GS/LS/TTR
408
408 GS/LS
408 GS/LS-MLX
800
800 GS/LS
800 DID
800 GS/LS-ID
800 NI-BRI
Total Estimated Unit Load
If total is less than 54 (for the 391A1 or 391A2 power supplies) or 75
(for the 391A3 power supply), no further calculation is required.
If total is 54 (391A1 or 391A2 power supplies) or 75 (391A3 power
supply) or more, continue to Step 6.
6. Calculate the actual carrier unit load.
If the total actual unit load is less than or equal to 54 (391A1 or 391A2
power supplies) or less than or equal to 75 (391A3 power supply), no
further calculation is required.
If the total actual unit load is more than 54 (391A1 or 391A2 power
supplies) or more than 75 (391A3 power supply), continue to Step 7.
If total is less than 45, no further calculation is
required.
If total is 45 or more, continue to Step 5.
Qty x Unit = Total
Load
12.0
13.25
8.0
8.4
12.8
0.0
0.0
8.0
0.0
12.0
12.0
13.5
0.0
0.0
8.0
8.0
0.0
System Planning
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