Problems with ISDN QSIG on 1751

[eyuki]

I'm connecting one 1751 on Siemens PBX through ISDN BRI QSIG port.

The IOS is 12.2(4)YH and the problem is that the router are trying to establish a conversation in channel 0 instead 1 or 2. Then the PBX refuse the incoming call.

Is there any way to configure the router to not use the channel 0 to establish a call?

Here goes the debug q.931

1w0d: ISDN BR1/0 Q931: TX -> SETUP pd = 8 callref = 0x00CB

Bearer Capability i = 0x9090A3

Standard = CCITT

Transer Capability = 3.1kHz Audio

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98380

Exclusive, Channel 0 <-------------- {Here happens the problem}

Calling Party Number i = 0x0183, '0713'

Plan:ISDN, Type:Unknown

Called Party Number i = 0x81, '0717'

Plan:ISDN, Type:Unknown

Sending Complete

1w0d: ISDN BR1/0 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x80CB

Cause i = 0x85E418 - Invalid information element contents

1w0d: ISDN BR1/1 Q931: RX <- DISCONNECT pd = 8 callref = 0x0001

Cause i = 0x8090 - Normal call clearing

1w0d: ISDN BR1/1 Q931: TX -> RELEASE pd = 8 callref = 0x8001

Cause i = 0x8090 - Normal call clearing

[Chester Rieman]

Is there a specific reason that YH code is being used?

Try loading 12.2(11) and see if it works.

a 'debug isdn q931' will show the q931 messages where this is exchanged.

[eyuki]

Because is the only version that support a NT/TE ISDN interface with QSIG signaling.

Refer to page: http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122relnt/1700/rn1700yh.htm#xtocid9

Is there any new IOS version?