Nortel DMS-100 Series Maintenance Manual page 81

Figure 2-26 Functional block diagram of the Star Module environmental system
Fiber optic connection
to Star Hub
Cable
terminator
To 64
subscriber
MDF
lines
TSS
heater
SMC
heater
control
120/220 V
ac input
ac panel
Alarm
FMT-6
Line
cards
POTS or
ISDN
RFI filter
Thermostat
To SMC
Thermostat
ac
alarm
RFI filter
DMS-100 Family NA100 Star Remote System XPM15 and up
Star Remote System hardware 2-61
Telephony subsystem
SMC
LMU
Rectifier
alarm
–48 V
ac/dc
rectifier
Temperature sensor
To
LMU Temperature sensor
Heater
Door alarm
Scan
Scan
Distribution
Distribution
Power
converter
and ringer
Winter/
summer
mode
dc panel
Fans
Battery
Battery compartment