DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-370CARR-POW (Carrier Power Supply)
9
CARR-POW (Carrier Power Supply)
DEFINITY systems support two different cabinet types : multi-carrier and
single-carrier. Single-carr ier cabinets are used only for EPNs. Both cab inet types
may be powered b y either AC or DC external power source. Environmental
maintenance differs acc ording to cab inet type and external p ower supply.
!CAUTION:

Before powering down a c abinet or carrier that contains DEFINITY AUDIX

circuit packs (TN566), first p ower down the AUDIX unit to avoid damag ing

the AUDIX software. Instructions for powering d own this unit are in the

‘‘DEFINITY AUDIX S ystem P ower P r ocedures’’ in Chapter 5, ‘‘Alarms, Errors,

and Troubleshooting’’, on the circuit pac k, and in DEFINITY AUDIX

documentation.

The CARR-POW maintenance object represents the pair of power supplies that
supply +5V, -48V and -5 VDC power to ea ch carrier in a multi-car rier cabinet. In
AC-powered cabin ets, these are called Off Line Switches (OLS); in DC-po wered
cabinets, they are DC/DC converte rs.

Cycling Power Supplies

When a port carrier power sup ply problem is rep orted by hardware, the sys tem
can cycle the p ower supplies in that c arrier. When a carrier is cycled , the power
supplies are turned off for 2 s econds and then turn ed back on. The system
cannot cycle the p ower supplies on any of the fol lowing types carr iers even if
they are duplicated:
— PPN control carrier
— Expansion control carrier
— Switch node carrier
— Single-carrier cabinet
!WARNING:

When port carrier power is c ycled, all servic e dependent up on circuit pac ks

in that carrier are disrupted.

MO Name (in
Alarm Log) Alarm Level Initial Command to
Run1
1.
UU
is the universal cabinet number (1 for PPN, 2-44 for EPNs),
C
is the carrier desig nation (A,
B, C, D, or E). Cycle the carrier indicated by the PORT field in the alarm log.
Full Name of MO
CARR-POW MAJOR Cycle carrier
UUC
Carrier Port Power Supply