FXO Inbound call issue

[Karim Moustafa Ahmed]

dears,

I have CUCM Version 8.6.2 (7 Servers) and at one site that have h323 gateway (2900) I have FXO Ports to the PSTN that have the below configuration:

Voice-port 0/1/0
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone XXX
 no vad
 cptone XX
 timeouts interdigit 5
 timeouts call-disconnect 5
 timeouts ringing 15
 timeouts wait-release 5
 connection plar opx 1234
 impedance complex2
 caller-id enable

 IOS 15.1.4

Outbound calls work fine

Inbound call : Caller hear ring tone but actually the phone with DN 1234 did not receive the calls.

I am getting the below disconnect code:

Aug 12 17:43:38.149: //676/7F42849383DD/CCAPI/ccCallDisconnect:
   Cause Value=49, Tag=0x0, Call Entry(Previous Disconnect Cause=0, Disconnect Cause=49)

from show voice port :

DisconnectText=qos unavailable (49)

I reviewed the configuration and compared it to a running VGW in another site and there re no difference in HW ot SW.

Any idea what does this disconnect cause mean.

Regards,

[Venkatesh Perumal · Accepted solution]

QOS Error Cause 49 indicates that the requested QoS cannot be provided.

http://www.cisco.com/c/en/us/td/docs/ios/voice/monitor/configuration/guide/12_4/vt_12_4_book/vt_ccodes_debug.html

Try removing the 'call fallback active' command or Configure "no call fallback" on the dial-peer and test a call.

http://www.cisco.com/en/US/docs/ios/12_3t/voice/command/reference/vrht_c3_ps5207_TSD_Products_Command_Reference_Chapter.html#wp1176900

-Venkatesh

[Karim Moustafa Ahmed]

Thank you Venperun for your answer I will try this tomorrow and I will update if it work.

[Karim Moustafa Ahmed]

Greeting Venperum,

It worked after I disable fallback on the dial-peer but I do not understand this behavior is this is a bug ?

Thanks and Regards

[Amr Mamdouh Salah El-Kashef]

Dear Ven ,

     it's solved also my issue but Can this affect on the SRST ???

Amr

[Jose_JuanCCNP]

Hello Venkatesh:

     I had the same problem and removing the command "call fallback active" I fixed the problem

    Thanks.