Table 2: Troubleshooting Table - GE JungleMUX 86445-31 Technical Practice And Installation Manual

Symptom
No transmission in - Ensure that JIF/JIF-Share units or JMUX units are not in alarm and the
either transmit or
receive direction.
- Ensure that Add and Drop configuration at both ends is correct per the
- Verify that local and remote unit configuration is correct.
- Check Transmit and Receive Levels and adjust accordingly.
- Verify that the loopback is disabled at both ends.
Signaling not - Ensure that the proper signaling type is selected at both ends.
functioning - Ensure that neither signaling direction is in test i.e. both Transmit
correctly
- Ensure that the sub-board (028-86445-04) is installed on the unit's
Red LED on
- Verify the unit temperature is not excessive (> 93°C).
- Verify that the sub-board (028-86445-04) is installed or an external
- If the condition persists after the unit is reseated, replace the unit
Copyright  GE Multilin Inc. 2002
Probable Cause / Solution
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.
Node Assignment Drawing.
- Verify that local and remote unit channel numbers and signaling
type selections are matching.
Signaling and Receive Signaling fields in Test Setup window are set to
"-" at both ends (if JCI is used, both Transmit Signaling and Receive
Signaling fields in Signalling Setup window are set to "NRML").
main board. Note that the sub-board must be removed if external talk
battery and ringing generator are used.
battery connection, ringing voltage and ringing control is provided.
(internal DC-DC converter failed).

Table 2: Troubleshooting Table

342-86400-445PS
Issue 4.0
October 2006
Page 36