Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

MGCP controlled PRI gateway will not work with T.38 enabled

We have a customer that needs to enable T.38 on their MGCP controlled gateway with PRI.  When we enable T.38 with the following commands, the PRI starts acting very strange.  For example a single inbound call will show up as about 10 attempted calls in q931 debugs, and no calls can go through until we remove the T.38 commands.

Router(config)# no mgcp fax t38 inhibit
Router(config)# mgcp package-capability fxr-package
Router(config)# mgcp default-package fxr-package

 

Any ideas?

Everyone's tags (1)
1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Please provide the call

Please provide the call manager version. and logs for following debugs for failed call

 

- debug isdn q931

- debug mgcp packets

 

2 REPLIES
Cisco Employee

Hi,Can you check if your IOS

Hi,

Can you check if your IOS and running config is not suspect to the following bug

https://tools.cisco.com/bugsearch/bug/CSCta55752

MGCP gateway unable to interpet SDP format when T.38 "and" V150 present
 
If yes, try upgrading to an IOS with the fix.
 
HTH
 
Manish
Cisco Employee

Please provide the call

Please provide the call manager version. and logs for following debugs for failed call

 

- debug isdn q931

- debug mgcp packets

 

90
Views
0
Helpful
2
Replies