User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Commands and Trouble-Clearing Aids
Page 8-519status system
8
SELECT SWITCH The position of the Emergency Transfer Switch on the Processor(s)
or the EPN maintenance circuit pack and the state of Emergency
Transfer in the cabinet are displayed as follows:
— on
The switch is in the right position. If this is a Simplex PPN or an
EPN, then designated analog phones in this cabinet are cut
through to CO trunk lines. The switch should only be in this state
in an emergency situation. In a High or Critical Reliability
System, the Emergency Transfer Switches on both SPEs in the
PPN must be in the on position before Emergency Transfer is
invoked for the PPN.
— off
The switch is in the left position and regardless of Simplex or
Duplex, PPN or EPN, Emergency Transfer is off and can not be
invoked by the system software. The switch should only be in
this state when a service technician is on sight.
— auto-on
The switch is in the or auto position, however, because of a
serious system fault, system software has invoked Emergency
Transfer.
— auto-off
The switch is in the or auto position and because the system
has no serious faults, system software has not invoked
Emergency Transfer.
— unavail
If the system has an EPN that is currently down, then unavail is
displayed for the Emergency Transfer.
— <blank>
If the system is Simplex, then the 1B Emergency Transfer
indication for the PPN will display a blank. If the system does
not have an EPN, then both the 1A and 1B Emergency Transfer
indications for the EPN will display a blank.