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MERLIN LEGEND Communications System Release 6.1
Installation
555-661-140
Issue 1
August 1998
Installing the Control Unit
Page 2-18
Installing the Basic Carrier
■ The carrier has a total of more than 45 MLX-20L telephones or
34-button analog multiline telephones installed.
Unit Loads for Key or Behind Switch Mode
In a Key or Behind Switch system with four or fewer modules, no
calculation is needed. The older power supplies (models 391A1 or
391A2) generally support four modules of any type. With more than four
modules, a newer power supply (model 391A3 or 391C1) may be
needed.
Installing the Basic Carrier
Continue with this procedure only if you have met all of the requirements
discussed earlier in this chapter.
NOTE:
When you mount the basic carrier onto the backboard, leave 29 in.
(73.66 cm) of backboard to the right. This allows you to easily
install and remove the control unit cover, and also allows enough
room for system expansion to the right for a total length of up to
three carriers.