Nortel DMS-100 Series Maintenance Manual page 9

ESA limits and restrictions 3-27
Limits during the ESA mode 3-27
Restrictions during ESA mode 3-28
Fault conditions 3-28
Unusable communication links 3-29
Loop-around message audit failure 3-29
Automatic ESA maintenance 3-30
ESA line audits 3-30
Digitone receiver audit 3-31
Automatic static data downloading and system maintenance 3-31
Routine exercise test 3-32
Escalation to manual maintenance 3-33
Loading ESA static translations data 3-33
ESA manual exit 3-34
LTC maintenance to prevent ESA mode 3-34
OPAC signaling
Signaling for OPAC 4-1
OPAC signaling links 4-1
Signaling protocol 4-2
Signaling functions 4-4
OPAC hardware
OPAC hardware components 5-1
Hardware configuration 5-1
Line concentrating module 5-7
Host interface equipment 5-8
Remote maintenance module 5-9
Modular supervisory panel 5-10
Fuse panel 5-10
Battery control unit 5-10
Rectifiers 5-11
T1 repeater shelf 5-11
Environmental controls 5-11
Additional OPAC components 5-13
Batteries/battery shelf 5-13
Operating company-provided equipment 5-14
Earthquake protection equipment 5-16
The OPAC recovery procedures
Recovering an out-of-service OPAC 6-2
Alarm clearing procedures
OPAC critical 7-2
LCM (RG) critical 7-16
OPAC talk battery alarm Critical 7-25
RLCM major 7-40
OPAC (RG) major 7-49
Ext MSP major 7-59
RMM major 7-76
OPAC minor 7-86
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Contents v
4-1
5-1
6-1
7-1