Fault Finding Tables - Telstra Commander E105 Installation And Maintenance Manual

Fault Finding Tables

Fault
Fault Description
No.
1 No audible incoming line
signal (line lamp flashes).
One station only.
2 No audible incoming line
signal (line lamp flashes).
More than one station.
No incoming line signal
3
(audible or visual).
One station only.
4 No incoming line signal
(audible or visual).
More than one station,
5 Line lamp does not flash with
exchange ring (audible signal
received).
One station only.
6 Line lamp does not flash with
exchange ring (audible signal
received).
More than one station.
The following tables provide an orderly set of steps for rectifying faults
in an established working system. The 'fault number' indicates the
order to follow when performing the diagnosis and repair procedures.
INCOMING EXCHANGE LINE FAULTS
TEST/REPLACEMENT SEQUENCE IN PREFERRED ORDER
Station P.T.U. OFB-E
2
4
3
3
5 4
3 2
Master Plug Pack
Station
2. Check bus wiring.
4 1. Check exchange line wiring.
2. Replace line cord.
1 2. Check exchange line wiring.
3. Check bus wiring.
2. Check bus wiring.