AT&T MERLIN LEGEND Release 3.0 Installation Manual page 286

Unit Load Calculation Worksheet
9. Try to exchange modules between carriers to reduce the unit loads for
slots five and six to 27. (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 8 to recalculate unit loads for new configuration.
If the exchange reduces the unit load for slots five and six to 27 or
less, auxiliary power is sufficient.
If the exchange does not reduce the unit loads for slots 5 and 6 to
27, install wall power units for the appropriate number of
telephones to reduce the unit load to 27.
NOTE:
Empty slots are not permitted between modules.
Installation B-9