AT&T MERLIN LEGEND Release 3.0 Installation Manual page 536

Unit Load Calculation Worksheet
7. Try to exchange modules between carriers to reduce the unit loads to
54. (Remember that the 100D, 400, 400 GS/LS/TTR, 800 GS/LS-lD, 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.
If the exchange reduces the unit load to 54 or less, auxiliary power
is not required.
If the exchange does not reduce the unit load to 54 or less,
auxiliary power is required. Continue to Step 8.
NOTE:
Empty slots are not permitted between modules.
C-6 Maintenance and Troubleshooting