User Manual
U-SYS IAD108 Integrated Access Device
Chapter 8 Troubleshooting
8-16
8.6.3 Processing Procedure
According the fault phenomena and causes analyzed above, the
processing procedures are as follows.
1) The network blocks ping function. A ping test cannot be
conducted.
2) Test the equipment when it is idle. If the problem remains,
network bandwidth problems can be ruled out.
3) Check the negotiation status of the uplink interface and find
that it is set by negotiation to 10M semi-duplex. Maybe it is
set to full-duplex on the peer end and to adaptive on our side,
and by negotiation it is set to semi-duplex. Modify it to
full-duplex. However, the problem remains.
4) Confirmation shows that mode of the photoelectric
transducer is 10M semi-duplex. After it is modified to
full-duplex, communication becomes normal.
8.6.4 Suggestion and Summary
Voice communication often generates a bidirectional network
traffic. The semi-duplex mode only allows a traffic in one direction at
one time, which leads to the problem in voice quality. Where possible,
the full-duplex mode should be set.
8.7
IAD Echo
8.7.1 Fault
When the IAD subscriber is in a conversation, there is an echo,
and the voice is intermittent.
