Nortel DMS-100 Series Maintenance Manual page 79

Figure 2-25 SRMO cabinet
Batteries There is one string of four lead/acid sealed batteries. The Star
Module in the SRMO cabinet uses Yuasa batteries, type NP18-12BFR, with a
nominal capacity of 12 V, 17Ah.
The batteries are made to support 8 hours of operation for the Star Module with
a fully equipped cabinet, running normal traffic. When the input ac voltage
drops to a range of 37 to 43 V, the batteries supply voltage to the rectifier to
power the Star Module. When the input ac voltage returns to within the 46 to
50 V range, the batteries are automatically disconnected.
Note: Because there is one set of batteries in the Star Module, only one
hardware test is provided every day and every 3 months.
– – – –
+ + + +
Battery fuse
holder
Battery compartment
DMS-100 Family NA100 Star Remote System XPM15 and up
Star Remote System hardware 2-59
Door interlock switch
TSS front cover
Fan and heater enclosure
Ground bar
Line termination unit (LTU)
(customer supplied)
NTTR47AA ac power panel
Fiber-optic organizer or DS-1
connection area