Administrator’s Guide for the V500System
7 - 12 www.polycom.com/videodocumentation
Error message occurs
when placing an ISDN
(H.230) call.
An ISDN cause code is
received from the ISDN
line.
Try the call again.
For more information, please refer to Q.850 Cause Codes
on page Appendix-4.
The highest-numbered
channel did not connect.
The system cannot make a
call if this channel does not
connect.
Be sure you are calling the correct number. The number
may need to include:
•A digit for an outside line
•A long distance access code
•An international access code
•A country code
•An area code or city code
Check that all network cables are properly connected.
Power off the system, wait five seconds, and power on the
system. Then wait about two minutes to allow the ISDN
lines to resynchronize.
Ask the person at the far site to call your system.
The ISDN switch type is
not configured correctly on
the V500 web interface.
Check the ISDN configuration and verify with your ISDN
service provider that the system is configured correctly.
Cannot complete calls to
sites that do not use
encryption
The system displays a
message stating that
encryption is required.
Your system is configured to require all calls to be
encrypted, and encryption is not available at the far site.
Cannot dial remote
system in bonding calls.
(The call progress circles
only show blue or yellow.)
Switch protocol issue. Start by calling the far site at 1x56 and progressively try
higher speeds, as appropriate. This will verify the primary
number.
Being able to dial non-bonded but unable to dial bonded
to all locations is usually a switch protocol issue. Verify
your ISDN provisioning with the telephone service
provider.
Dialing a remote site in
calls above some
particular speed does not
work. (The call progress
circles do not turn green,
or remains blue.)
The far site may be unable
to accept calls above this
speed.
Go to the Call Status screen. Highlight the circle for the
channel dialed. The number dialed for the channel will be
displayed as you highlight the circle. Make sure that the far
site has entered the number for its ISDN lines correctly.
Cannot select the desired
speeds for bonding calls
from the speed selection.
Speeds do not show when
selecting the speed icon. 1. Go to Admin Settings > Network > Call Preference
and select four times to go to the Call Speeds
screen.
2. Select the desired call speeds.
Symptom Problem Corrective action