Nortel DMS-100 Series Maintenance Manual page 31

• power control unit (PCU)
• battery control unit (BCU)
• rectifiers
• batteries
• FSP
• OPM grounding network
The cabinet requires a standard 30A, single-phase, 208V commercial ac
supply. The battery reserve of the OPM consists of: eight strings of Yuasa
A037761 or six strings of Eagle-Picher A0386201 batteries. The OPM-256
has 6 strings. When the batteries are installed and at 100% capacity, this
reserve corresponds to 178 Ah Yuasa and 162 Ah Eagle-Picher. Batteries
calculated at 80% capacity, which corresponds to 142 Ah Yuasa and 129.6 Ah
Eagle-Picher reserve power, are at the end-of-life.
When the external temperature is -40°C (104oF), the battery reserve for the
OPM-640 and OPM-256 is at 80% capacity. At 80% capacity the batteries
provide 8 h of backup power at a call rate of 300 call seconds (CCS). During
extended power outages, an emergency generator connected to the emergency
power generator port can supply ac power.
Cable-connecting compartment
The cable-connecting compartment is in the end-access compartment. This
compartment provides outside plant cable protection and termination and
cross-connection with the following:
• entrance for buried incoming ac power and ground cable
• entrance for ground rod or cable from ground rod
• entrance for buried incoming subscriber pairs
• entrance for buried pairs of incoming DS-1 lines
• entrance for buried pairs incoming special service lines
• the cabinet ground bar
• one gas or solid state protector for each subscriber pair
• 12 gas tube or solid state protectors for DS-1 lines
• 88 gas tube or solid state protectors for special service lines
• BIX terminals to connect subscriber pairs, DS-1 lines and special service
lines
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
OPM maintenance summary 1-15