Resolving Isdn Video Quality Issues - RADVision SCOPIA 400 User Manual

R ISDN
ESOLVING
V Q
IDEO UALITY
I
SSUES
Possible Causes
The LAN network is suffering from
massive packet loss.
If the problem is not resolved, contact
RADVISION Customer Support.
This section describes what to do if you encounter poor video quality on the
ISDN endpoint.
Possible Causes
The ISDN connection is not stable, and the
orange/yellow panel LEDs are steady or
flickering.
ISDN endpoint problem.
LAN endpoint problem.
LAN problems.

Resolving ISDN Video Quality Issues

Verification Steps
At Gateway > Settings > Advanced, verify
that Enable packet handling is checked, and
increase the value of the Network jitter
tolerance parameter if necessary.
Provide the following information to
RADVISION Customer Support:
Gateway traces with level 6.
H.323 stack log.
Gateway media recording.
Ethereal trace of the Gateway.
Verification Steps
Call your operator for help.
Check your PABX.
Make a call to other ISDN endpoints (from
the same vendor and from different
vendors). If the video quality is good, there
may be an interoperability problem with the
specific endpoint.
Make a call from another LAN endpoint. If
the video quality on the ISDN endpoint is
good, the problem lies with the LAN
endpoint you are calling from.
Make a LAN-to-LAN call and verify that
the LAN interface performance is
satisfactory (no packet loss, jitter or delay
issues occur). Check with the network
administrator if necessary.
Troubleshooting the SCOPIA Gateway 173