Pftu Operation - Meridian Nortel 1 Option 11C Technical Reference Manual

Page 202 of 544

PFTU operation

553-3011-100 Standard 14.00
Power supplies
Power is switched over to the Power Fail Transfer Unit (PFTU) during any of
the following conditions:
• The CPU sends a signal to the PFTU
• A power failure occurs
• A CPU failure occurs
• The PFTU is manually activated
• The fiber link to an expansion cabinet fails (PFTU for that cabinet only)
The Option 11C power supply connects to the PFTU through the AUX
connector at the bottom of the main cabinet, and in each expansion cabinet.
Table 63 provides the pinouts at the cross connect terminal for the Auxiliary
cable.
Table 63
Auxiliary cable pinouts
Cable
BL-W 1 Dot
BL-W 2 Dot
O-W 1 Dot
O-W 2 Dot
G-W 1 Dot
G-W 2 Dot
BR-W 1 Dot
BR-W 2 Dot
January 2002
Signal
BRTN
BRTN
-48 V AUX
PFTS
-15V AUX
+15V AUX
-
-