Nortel dropping calls
We have several Nortel BCM phone systems that are connected via IP trunks. When calls are placed system to system they drop after 15 minutes exactly, every time. Can't figure out why these calls are dropping. All of the traffic passes through a Sonicwall NSA 3500. We've already ruled out TCP timeout issues in the access rules and flood protection settings. Anyone have any suggestions as to what could the be the culprit?
Mike Roe
What BCM systems 200,400, 1000 etc
Check clocking
Resources, Media Bay Modules, Bus 7, Modules on Bus, click on Module 1 and check the Clock Source. It usually says Master but needs to be set as Primary. If you change it then the t1 will be disabled for a moment.
Resources, Media Bay Modules, Bus 7, Modules on Bus, click on Module 1 and check the Clock Source. It usually says Master but needs to be set as Primary. If you change it then the t1 will be disabled for a moment.
ASKER
The main ones are BCM 400's we also have 2 BCM 50's in the mix. The problem seems to be with all sites. They are not connected with T1's so can't be a T1 timing issue.
Can you change those setting and see if it fixes the issue if you have the media bay bus 7
Also on the sonicwall do you have Qos setup
ASKER
The problem didn't occur until we put the sonicwall into the mix. Again we don't use any T1's so we don't have a T1 card in any of our BCM's all the IP Trunks go over Ethernet. We are looking at sonicwall QOS settings and have tried several options but the 15 minute call drop still occurs. The quality of the call is perfect until it just goes away.
Are they SIP? If SIP they do not use TCP it is UDP abd there is a timeout for UDP also
ASKER
The phone systems are pre-sip. The BCM 400's are on version 3.7.
In the firewall do you have anything related to traffic inspection setup
ASKER
We found a solution. We had to create any any access rules in the soncwall for both BCM's and under advanced changed the TCP/IP timeout from 15 min to 360 min.
ASKER
I've requested that this question be closed as follows:
Accepted answer: 0 points for AARONCONLEY's comment #a39561032
for the following reason:
The solution we finally foud on our own solved the problem.
Accepted answer: 0 points for AARONCONLEY's comment #a39561032
for the following reason:
The solution we finally foud on our own solved the problem.
ASKER CERTIFIED SOLUTION
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