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New Member

PRI - No disconnected/not in service message

Running CCM 3.3 using 2561XM router as a gateway. When making a call to a number that is not in service, I do not get the message stating that the number is not in service, it just disconnects. I have included the Q931 trace for the call.

Jul 14 11:21:35.013: ISDN Se0/0:23 Q931: TX -> SETUP pd = 8 callref = 0x2A94

Bearer Capability i = 0x8090A2

Standard = CCITT

Transer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA9838F

Exclusive, Channel 15

Display i = 'Joe User'

Calling Party Number i = 0x2181, '1115551212'

Plan:ISDN, Type:National

Called Party Number i = 0x80, '18006206659'

Plan:Unknown, Type:Unknown

Jul 14 11:21:35.045: ISDN Se0/0:23 Q931: RX <- STATUS pd = 8 callref = 0xAA94

Cause i = 0x82E3 - Information element not implemented

Call State i = 0x01

Jul 14 11:21:35.081: ISDN Se0/0:23 Q931: RX <- CALL_PROC pd = 8 callref = 0xAA9

4

Channel ID i = 0xA9838F

Exclusive, Channel 15

Jul 14 11:21:35.482: ISDN Se0/0:23 Q931: RX <- DISCONNECT pd = 8 callref = 0xAA

94

Cause i = 0xC284 - Vacant code or prefix digit not dialed

Jul 14 11:21:35.518: ISDN Se0/0:23 Q931: TX -> RELEASE pd = 8 callref = 0x2A94

Jul 14 11:21:35.550: ISDN Se0/0:23 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x

AA94

Jul 14 11:21:38.270: ISDN Se0/0:23 Q931: RX <- DISCONNECT pd = 8 callref = 0x75

87

Cause i = 0x8090 - Normal call clearing

Jul 14 11:21:38.331: ISDN Se0/0:23 Q931: TX -> RELEASE pd = 8 callref = 0xF587

Jul 14 11:21:38.351: ISDN Se0/0:23 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x

7587

3 REPLIES

Re: PRI - No disconnected/not in service message

Have a look at ,

http://www.cisco.com/warp/customer/788/voip/busytone.html

Which basically says it's to do with progress indicators.

No Busy Tone or Announcement Message Received when Placing VoIP Outbound Calls

Symptom

A Cisco IP phone (CallManager scenario) or POTS phone (VoIP Toll-Bypass scenario) does not hear a busy tone or announcement message from the PSTN network.

Solution

Configure the Cisco IOS global configuration command voice call convert-discpi-to-prog (Cisco IOS Software Release 12.2(1) and later). This command converts an inbound ISDN disconnect message with a PI to a H.225 progress message with the same PI value. This command can help when an announcement is played on the terminating PSTN side, but the calling party does not hear the response.

Paul

New Member

Re: PRI - No disconnected/not in service message

The gateway is setup in MGCP mode, do you know if there is a MGCP command to do this?

New Member

Re: PRI - No disconnected/not in service message

Hi,

I'm currently working on a call disconnection issue, and have been advised by TAC that the CM Service Parameter: "Retain Media On Disconnect With PI For Active Call" when set to 'false'(default), CM will tear the call down immediately.

This parameter was only made available based on CSCea75653 resloved in 03.3(02)ES27.

Hope this helps.

Thanks

Azam

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