Imux – Polycom Webcam User Manual

Page 273

Chapter 8 - Troubleshooting

271

IMUX

Symptom

Cause

Solution

Cannot dial remote
system in BONDING 384
K calls

The call progress circles only
show blue or yellow.

Switch protocol issue.

Start by calling the far-site at 1x64 or 2x64K.
This will verify if the primary number is
correct. If these calls complete, try 256K then
384K.

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 Telco.

Dialing a remote site in
calls above 128 K does
not work.

The Call Progress circles do
not turn green, or remain
blue after the first channel
connects.

Go to the call status screen. Highlight each of
the circles for each of the channels dialed.
The number dialed for each channel will be
displayed as you highlight the corresponding
circle. Make sure that the far site has entered
the number for each of its ISDN lines
correctly. The numbers for Line 1 - Line 4
should correspond with connections 1 - 4 on
the IMUX.

System will not start.

The system restarts over and
over again.

Defective cable between the IMUX and the
system. Check that the green lights on each
ISDN card are on and that the green light on
the top of the IMUX is on (red on older units).
The cable from the IMUX to the system is a
straight RJ-45 x RJ-45 cable. Bad power
supply.

Cannot select 112 or 128
speeds for BONDING
calls from the speed
selection icon on the
Video Phone.

Speeds do not show when
selecting the speed icon.

Add line speeds by going to IMUX Dialing
Speeds screen.