Cisco Systems IPMUX-1E operation manual IPmux-1 Troubleshooting Chart

Chapter 4 Troubleshooting and Diagnostics IPmux-1/1EInstallation and Operation Manual

4.2 Troubleshooting

Table 4-2presents the event types as they appear on the Event Log File and lists the actions required to correct the event (alarm) indication. For further information, see Chapter 3.

Table 4-2. IPmux-1 Troubleshooting Chart

Fault	Probable Cause	Remedial Action
E1/T1 equipment connected to	Configuration problems	1.	Check cables and physical connectivity.
IPmux-1 is not synchronized		2.	Check IPmux-1 E1/T1 configuration and,
with IPmux-1/1E.
	Physical layer problems		if necessary, other IPmux-1 parameters.
		3.	Check E1/T1 physical connection (use
			loopbacks).

Slips and errors in	• Ethernet port in switch and
E1/T1/ISDN/FXS/FXO/E&M	IPmux-1 are not in the same rate or
equipment	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)
	• Deactivation employed by NT
	when IPmux is TE and in loopback
	timing mode
	• 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-1 port configuration (negotiation, rate, duplex mode).

4.Check PDV introduced by the network, and, if necessary, increase PDVT jitter buffer setting.

5.Check NT deactivation (ISDN BRI).

Echo in voice	High delay in voice path	1.	Check network delay and try to
			decrease it.
		2.	Try to decrease PDVT (jitter) buffer.

4-4 Troubleshooting