Nortel DMS-100 Series Maintenance Manual page 74

1-58 Maintenance overview
Loss of talk battery
The following figure describes how talk battery is distributed in a remote
line concentrating equipment (RLCE) frame with LCA shelves.
Talk battery distribution on RLCE frame
The A feed provides talk battery for the second shelf of the RLCE frame,
while the B feed provides talk battery for the first shelf. The feeds are not
redundant. Redundancy can affect a maximum of 320 subscriber lines.
Note that some redundancy is present with the talk battery returns. A single
fault does not cause an outage.
297–8351–550 Standard 04.01 August 1999
RLCE
FSP
RMM
cooling baffle
HIE
LCA–1
LCA–0
cooling baffle
Talk battery return
For redundancy of return
Talk battery fuses
Talk battery A feed
Talk battery
fuses
Talk battery B feed
Power
distribution
center