3945 E1 Cable And Wirless disconnect issue

jeroenhermans · ‎05-27-2012

Hi,

We have a 3945 with a Cable and Wireless E1 circuit on it in the UK. The CUCM version is 7.1.5

When we receive inbound calls and hang up the call from the ipphone, the call clears from the IPphone but the other end sees the call still active.

When we disconnect the call from the pstn side, it clears correctly on both ends.

Below is a debug isdn q931 from a call disconnected from the ipphone side :

GBWEYVG01#

*May 27 10:02:14.331: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8 callref = 0x0007

Sending Complete

Bearer Capability i = 0x9090A3

Standard = CCITT

Transfer Capability = 3.1kHz Audio

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98381

Exclusive, Channel 1

Progress Ind i = 0x8A81 - Call not end-to-end ISDN, may have in-band info

Calling Party Number i = 0x00C3, N/A

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '6998'

Plan:Unknown, Type:Unknown

*May 27 10:02:14.331: ISDN Se0/0/0:15 Q931: Received SETUP callref = 0x8007 callID = 0x0061 switch = primary-net5 interface = User

*May 27 10:02:14.347: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x8007

Channel ID i = 0xA98381

Exclusive, Channel 1

*May 27 10:02:14.347: ISDN Se0/0/0:15 Q931: TX -> ALERTING pd = 8 callref = 0x8007

Progress Ind i = 0x8188 - In-band info or appropriate now available

*May 27 10:02:16.315: ISDN Se0/0/0:15 Q931: TX -> CONNECT pd = 8 callref = 0x8007

*May 27 10:02:16.331: ISDN Se0/0/0:15 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x0007

<<<<<<<<<This is the moment we press the call end button on the ipphone, the call is still connected on the pstn phone then>>>>>>>>>>>>>>>>>>

*May 27 10:02:20.907: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x8007

Cause i = 0x8090 - Normal call clearing

GBWEYVG01#

<<<<<<<<<This is the moment we press the call end button on the pstn phone>>>>>>>>>>>>>>>>>>

*May 27 10:02:41.775: ISDN Se0/0/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x0007

Cause i = 0x8290 - Normal call clearing

Display i = '*AA*CLEARED#'

*May 27 10:02:41.775: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x8007

How can we fix it so that the call disconnects normally?

Thanks in advance,

Jeroen

paolo bevilacqua · ‎05-27-2012

There is nothing you can or should do beside complaing to telco.

The trace shows that router is disconnecting the call correctly, however CO doees not respond to that.

You can try if it makes any difference when the call is initiated as outbound rather than inbound, because some telco may still stick to the ancient concept that call can be disconnected only by the party that placed it.

jeroenhermans · ‎05-27-2012

Thanks, I have logged a ticket with the provider. Let's see what they come back with.

Rgds,

Jeroen