Specifications

Installation and Operation Manual Chapter 6 Diagnostics and Troubleshooting
IPmux-24 Ver. 1.5 Testing IPmux-24 6-17
Trap Description, Severity OID
prtStatusChangeTrap Change in the NET or NET/USER port status when
Ethernet ring is active
1.3.6.1.4.1.164.6.1.0.3
ethIfRingStatusChange Change in Ethernet ring status 1.3.6.1.4.1.164.3.1.6.1.4.0.1
6.4 Troubleshooting
Table 6-6 presents the event types as they appear on the Event Log File and lists
the actions required to correct the event (alarm) indication.
Table 6-6. Troubleshooting Chart
Fault Probable Cause Remedial Action
E1/T1 equipment connected to
IPmux-24 is not synchronized
with IPmux-24.
Configuration or physical layer
problems
1. Check cables and physical
connectivity.
2. Check IPmux-24 E1/T1
configuration and, if necessary,
other IPmux-24 parameters.
3. Check E1/T1 physical connection
(use loopbacks).
Slips and errors in E1/T1
equipment
• Ethernet port in switch and
IPmux-24 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 shown on IP
channel status menu)
• Network PDV or lost frames
1. Check E1/T1 physical connection
(use loopbacks).
2. Check timing settings according to
explanation in this manual.
3. Check switch and IPmux-24 port
configuration (negotiation, rate,
duplex mode).
4. Check PDV introduced by the
network, and, if necessary, increase
PDVT jitter buffer setting..
Echo in voice High delay in voice path 1. Check network delay and try to
decrease it.
2. Try to decrease PDVT (jitter) buffer.
6.5 Testing IPmux-24
Diagnostic capabilities of IPmux-24 include:
• Activating loopbacks (internal and external)
• Responding to T1 inband loopback activation code
• Pinging IP hosts
• Running a trace route.