IPmux-16 Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics
Troubleshooting 4-3
4.2 Troubleshooting

The following table presents the event types as they appear on the Event Log File

and lists the actions required to correct the event (alarm) indication.

Table 4-2. IPmux-16 Troubleshooting Chart

Fault Probable Cause Remedial Action
The E1/T1 equipment
connected to IPmux-16 is not
synchronized (E1/T1 level) with
IPmux-16
Configuration problems 1. Check IPmux-16 port
configuration and, if
necessary, other IPmux-16
parameters.
2. Check E1/T1 physical
connection (use loopbacks).
Slips and errors in E1/T1
equipment
• Ethernet port in switch and
IPmux-16 are not in the same
rate or duplex mode
• Ethernet port is set to work in
half duplex mode (may cause
extreme PDV because of
collisions and backoffs)
• Timing configuration is not
properly set (periodic buffer
under/overflows – bundle
connection status menu)
• Network PDV or Lost Frames
1. Check E1/T1 physical
connection (use loopbacks)
and E1/T1 statistics.
2. Check timing settings
according to explanation in
this manual.
3. Check switch and IPmux-16
port configuration
(negotiation, rate, duplex
mode) and check Ethernet
statistics.
4. Check PDV introduced by
the network, and, if
necessary, increase PDVT
jitter buffer setting.
Echo in voice 1. Check network delay and try
to decrease it.
2. Try to decrease PDVT (jitter)
buffer.