Chapter 7 - Diagnostics and General Troubleshooting

Symptom

System

Cause

Solution

 

 

 

 

ISDN calls:

All

The call is not connecting

Try the call again.

ISDN Line Status

 

properly.

 

icons do not turn

 

 

 

 

The system is not connected

Check the ISDN line connections.

green so ISDN calls

 

 

to an ISDN network.

 

cannot be

 

 

 

 

 

completed.

 

The ISDN number or SPID

Make sure your ISDN numbers are

 

 

 

 

numbers are entered

entered correctly. Check the ISDN

 

 

incorrectly.

numbers with your service provider.

 

 

Note: The AT&T point-to-point

Select the Clear icon on the Auto

 

 

protocol does not require

Detect SPIDs page, and then select the

 

 

SPIDs.

Start icon to automatically detect the

 

 

 

new SPIDs.

 

 

 

 

 

 

The system was not able to

Check with your ISDN service provider

 

 

auto-detect SPIDs.

and enter the SPIDs and switch

 

 

 

protocol manually.

 

 

 

 

 

 

The Quad BRI network

Install an NT-1 device between your

 

 

interface module is directly

network interface module and the ISDN

 

 

connected to a U interface.

connection.

 

 

 

 

 

 

The system is connected to an

You do not need an NT-1device when

 

 

NT-1 then to a PBX.

connecting to a PBX. Connect the

 

 

 

system directly to the PBX S/T

 

 

 

connection.

 

 

 

 

 

 

The ISDN line is provisioned

Check that your ISDN line is

 

 

incorrectly by the ISDN

provisioned for Voice/Data, Voice/Data.

 

 

network service provider.

 

 

 

 

 

System displays a

All

This can occur if the system

Wait about three minutes and try the

message indicating

 

uses a PRI E1 network

call again.

network congestion

 

interface module that is

 

when placing an

 

connected to an Adtran Atlas

 

ISDN call

 

800 Plus module. After power

 

immediately after

 

on, the Adtran module must

 

starting the system

 

complete channel restarts

 

 

 

before the system can

 

 

 

complete ISDN calls.

 

 

 

 

 

Cannot make

All

Switch protocol issue.

Start by calling the far site at 1x56,

bonding calls. (The

 

 

1x64, 2x56, or 2x64 Kbps, as

call progress circles

 

 

appropriate. This will verify the primary

only show blue or

 

 

number. If these calls complete, try 256

yellow.)

 

 

Kbps, then 384 Kbps.

 

 

 

Being able to make non-bonded calls

 

 

 

but not bonded calls to all locations is

 

 

 

usually a switch protocol issue. Verify

 

 

 

your ISDN provisioning with the

 

 

 

telephone service provider.

 

 

 

 

© Polycom, Inc.

7-15

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Polycom VS4000 manual Symptom System Cause Solution
Page 136 Page 138

VS4000 specifications

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In conclusion, the Polycom VS4000 is a powerful video conferencing solution that combines advanced technologies with user-friendly features. Its high-definition video and audio quality, scalability, interoperability, and collaboration tools make it an attractive choice for businesses looking to improve their communication strategies and strengthen team interactions. Whether in a small meeting room or a large corporate office, the Polycom VS4000 provides a reliable and state-of-the-art conferencing experience.
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