Loopback Commands; Troubleshooting; Table 15: Troubleshooting Table - GE JungleMUX 86445-31 Technical Practice And Installation Manual

Loopback Commands

Local and Line (remote) loopbacks can be performed for the purpose of testing
and maintenance. These lopbacks are explained in the Configuration section
under Test Setup.

Troubleshooting

If an 86445-32 2W FXS unit is suspected of being defective, substitute it for a
known-good 86445-32 unit and if the unit functions properly return the original to
GE Multilin for repair or replacement.
configured correctly.
The following table is intended to provide the user with possible solutions to
problems that may be encountered during normal unit operation.
Symptom
No transmission in
either transmit or
receive direction.
Signaling not
functioning correctly
Red LED on
Copyright  GE Multilin Inc. 2002
Probable Cause / Solution
- Ensure that JIF/JIF-Share units or JMUX units are not in alarm and
the VT/DS0 channel path is correct.
- Verify that VT dropped at JMUX unit(s) is correct; check
TSI/CC configuration (if applicable).
- Verify that VT assigned at JIF/JIF-Share unit(s) is correct.
- If a shared VT is used, verify the correct DS0 channels are
dropped at JIF-Share unit(s).
- Verify that the unit is physically connected to the proper JVT
port.
- Ensure that Add and Drop configuration at both ends is correct per
the Node Assignment Drawing.
- Verify that local and remote unit configuration is correct.
- Verify that local and remote unit channel numbers and
signaling type selections are matching.
- Check Transmit and Receive Levels and adjust accordingly.
- Verify that the loopbacks are disabled at both ends.
- Ensure that the proper signaling type is selected at both ends.
- Ensure that neither signaling direction is in test i.e. both Transmit
Signaling and Receive Signaling fields in Test Setup window are set
to "-" at both ends.
- Verify that the unit temperature is not excessive (> 93°C).
- Verify that the shelf (JVT) clock is presented to the unit (verify
traceability to the given JVT port).
- If the condition persists after the unit is reseated, replace the unit.

Table 15: Troubleshooting Table

342-86400-445PS
Issue 4.0
October 2006
Page 72
Ensure that the substitute unit is