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System requirements
QSY22 Power Supply
Message Center is available with Generics X05, X09, X11, and X37. The
feature is available with all issues of the above generics. The interrupted dial
tone form of Message Indication is available with X11 Release 2.
Power to operate the Message Waiting lamps for 500 and 2500 telephones is
supplied by the QSY22 Message Waiting Power Supply Unit. (SL-1
telephones do not require this power supply.) This unit replaces the earlier
QSY19 Power Unit.
The power supply can be mounted in the following cabinets: QCA23
(SL-1LE), QCA28 (SL-1A), QCA37 (SL-1M), and QCA8. The power supply
is capable of providing power to the Message Waiting line cards of two full
PE cabinets (QCA7 and QCA8).
Message Center
Description and operation
Page 23 of 48
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