Call drops two way audio exactly after 30min

[Anonymous]

Hi all. When our users are on the phone for more than 30 minutes, audio stops working both ways.  If either the calling party or the called party places the call on hold and takes it off hold, two way audio is re-established.  Audio stops working after exactly 30 minutes.  Is there anything I can check on my end on the Netvanta 7100? Thank you.

[jayh]

On the SIP trunk, turn on keepalives. You may need to consult with your SIP provider to determine if INFO or OPTIONS is preferred. On the SIP trunk configuration, add:

sip-keep-alive info

or

sip-keep-alive options

You can also specify a value in seconds like:

sip-keep-alive info 300

which will send a keep-alive message every five minutes.

[Anonymous]

I configured keep alive on the SIP trunk using Info and the call was terminated after 5 minutes.

[Anonymous · Accepted solution]

Thanks for the help. The following config entries were causing the problem.  Issue was resolved after removing them. sip timer d 0 sip timer j 0