Call disconnect as Soon as Answer...

[razzak]

i have PBX ---- > CISCO 2811 (VIA T1 connection ) -----> VOIP as carrier ....

IOS 15.4

incoming calls from Voip carrier is completed without any issues ..... completed and answered on PBX phone ...

outbound call from PBX showing that reach to Serial Port then dial Dial-peer reached to Voip carrier and as soon as call answered cisco is sending disconnect signal ...

Please help me out of it

[Manish Gogna]

You will need to share the debugs for a failed call to see what is going wrong with the signaling or media negotiation.

Manish

[Nirmal Issac]

Could you share the ccapi and q931 debugs? Also, what is the disconnect code?

[razzak]

debug added

[Nirmal Issac]

*Sep 21 14:39:56.363: ISDN Se1/0/0:23 **ERROR**: Ux_Status: STATUS call state mismatch with invalid cause: cause 0x63, state 0xA, peer state 0x4
*Sep 21 14:39:56.363: ISDN Se1/0/0:23 Q931: TX -> RELEASE pd = 8  callref = 0x8003
        Cause i = 0xC2E5 - Message not compatible with call state

The error code 0x0x63 in the error message means BAD_INFO_ELEM.

This is normally a config issue. I would like you to test the below.

a) Issue the below commands in the isdn interface

int se 1/0/0:23
no isdn out ie display

shut and no shut the interface and test the call again.

b) Compare the isdn switch type and confirm that the gateway configuration matches the other end.

Regards

Nirmal Issac