Nortel DMS-100 Series Maintenance Manual page 79

In the OPM, the LCM connects two to six DS-1 C-side links to the 640
subscriber lines. This interface contains the following parts:
•
•
•
Figure 1 Bay frame equipment location, OPM-640, (NT8X01AA, AB)
High
temperature alarm
Low
temperature
heater switch
The OPM has a minimum of two DS-1 links because each primary link carries
one message channel to the LGC or LTC. Each DS-1 link carries 24 speech
channels making available a possible 48 to 144 channels. Two of the available
channels are always nailed up to the host controller. A maximum of six ports
2 power converters
2 control complexes (LCM processor and digroup control card)
20 LSGs
Fuse panels
LCA-1
LCA-0
HIE
ECU
BAY 0
Diffuser Low
filters temp.
alarm
sensors
(each
ECU)
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
Bay locking High
knobs temperature alarm
0 0
DS-1
Repeater
Cards
RMM
ECU
BAY 1
Bay locking Diffuser
knobs filters
Low temperature
heater switch
Functional overview 2-3
Door
switch
RECT1
PCU
RECT0
FSP
Damper Low
control temp.
sensors alarm
sensors
(each
ECU)