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Modem 3600 D-1
Appendix D
Fault Isolation Procedure
Fault Isolation Procedure
This diagnostic test procedure and the indicator lights built into the
modem allow a rapid check of the terminals, modems, and telephone line
interface. This procedure can be used to verify normal system operation
and to isolate faulty equipment in case of failure.
Ensure the units are turned on and remote loops are enabled at both sites
before starting the fault isolation procedure.
Note
In some cases the observer must distinguish between rapid LED
blinking and steady on in tests.
Telephone Interface
1) Connect the modem to the dial-in line by the LINE jack on the back
panel.
2) If the dial line is installed with a standard data jack, connect a
standard telephone to the TELSET/LEASED LINE jack on the
back panel of the modem and use the standard telephone procedure.
Standard Phone
1) Configure the modem to V.34 33600 IDLE mode by pressing the
TALK/ DATA button, and then lift the receiver. No dial tone is
heard. Press the TALK/DATA button to display V.34 IDLE and
wait for dial tone.
2) Dial out; the phone should operate normally.