Ntak75 Extended Battery Back-Up Unit - Meridian Nortel 1 Option 11C Technical Reference Manual

NTAK75 extended battery back-up unit

Table 60
Dimensions of NTAK75 and NTAK76 batteries
Card
NTAK75 19" (480 mm)
NTAK76 12.25" (312 mm)
The batteries supplied with the NTAK75 have an average useful life of four
years, meaning the batteries are depleted to 80% of capacity, and backup time
is diminished. After this period of time the batteries should be replaced. For
more information refer to Option 11C and 11C Mini Fault Clearing (553-
3011-500). The mean time between failures (MTBF) of the NTAK75 without
batteries is 100 years at 25
Length
Spares planning
°
C.
Width
11.5" (290 mm)
9.75" (250 mm)
Option 11C and 11C Mini
Page 195 of 544
Depth
11" (280 mm)
6.25" (160 mm)
Technical Reference Guide