Phone hangs up after half a ring for inbound calls

[mpence111]

I have 2 extensions on 2 different VG224's that hang up after half a ring when dialing them. They call out just fine, only inbound calls are the issue. I have moved them to different ports, changed extension numbers, replaced the phone,  problem still exists. I ran a show voice call summary and dialed the number and on that port I get a FXSLS_WAIT_RELEASE_REQ and then the calls goes back on hook. Any help would be greatly appreciated.              

[problemchild27]

Hi,

     What is the IOS version? in the particular voice-port try "no caller id enable" shut & unshut the port and try making the call to the DN mapped in the interface.

Thankyou

     PC

[mpence111]

IOS version is 12.4(22)T5.

Tried the no-caller id enabled and done a shut no shut on the port and it the issue still exists.

Thanks,

Mark

[Leo Laohoo]

Do you have NAT enabled?

[mpence111]

NAT is not enabled.

[Leo Laohoo]

I was setting up Asterisk at home when I encountered this.  After a few hours of troubleshooting, this was because I enabled NAT when my VSP recommends I turn NAT off.

During the issue, the calls would not last 20 seconds.

So after I disabled NAT, everything went fine.

I'm not sure, but talk to your VSP and ask them if NAT should be enabled or disabled.

[mpence111]

The strange thing is, all the other phones on these VG's work fine, it is just these 2 lines.

[Leo Laohoo]

I'm nof familiar with VG's but how did you create these two problematic extension numbers?  Did you "clone" or "duplicate" them or did you create a brand-new template?

[mpence111]

Setup the ports in Call Manager the exact same way as the extensions that are working. Looked at the configurations and mirrored them.