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New Member

cannot establish ISDN connection

I did a debug isdn q931 and got the following message when attempting to

connect from one cisco 2500 to another. What could be the cause?

Jul 29 18:42:57.471: ISDN BR0/0: TX -> SETUP pd = 8 callref = 0x49

Jul 29 18:42:57.471: Bearer Capability i = 0x8890

Jul 29 18:42:57.471: Channel ID i = 0x83

Jul 29 18:42:57.471: Called Party Number i = 0x80, '006562617386'

Jul 29 18:42:57.647: ISDN BR0/0: RX <- SETUP_ACK pd = 8 callref = 0xC9

Jul 29 18:42:57.647: Channel ID i = 0x89

Jul 29 18:43:04.735: ISDN BR0/0: RX <- CALL_PROC pd = 8 callref = 0xC9

Jul 29 18:43:12.099: ISDN BR0/0: RX <- PROGRESS pd = 8 callref = 0xC9

Jul 29 18:43:12.099: Progress Ind i = 0x8281 - Call not end-to-end

ISDN, may have in-band info

Jul 29 18:43:19.979: ISDN BR0/0: RX <- DISCONNECT pd = 8 callref = 0xC9

Jul 29 18:43:19.983: Cause i = 0x8A9F - Normal, unspecified or

Special intercept, call blocked group restriction

Jul 29 18:43:19.987: ISDN BR0/0: TX -> RELEASE pd = 8 callref = 0x49

Jul 29 18:43:19.991: Cause i = 0x809F08 - Normal, unspecified or

Special intercept, call blocked group restriction

Jul 29 18:43:20.035: ISDN BR0/0: RX <- RELEASE_COMP pd = 8 callref = 0xC9

Jul 29 18:43:20.035: Cause i = 0x8A9F - Normal, unspecified or

Special intercept, call blocked group restriction

2 REPLIES
New Member

Re: cannot establish ISDN connection

According to the cause code 0x8A9F, it looks like the problem is on the destination network. It could be that between you and the called site, the telco network cannot handle 64K calls. Try a 56K call. To do this add "speed 56" to your dialer map. If that fails, you'll need to contact your provider to have them test.

Cisco Employee

Re: cannot establish ISDN connection

Pl. try to see that the call has received by destination router or not..Mostly not..

Here is the url which discuss "isdn disconnect cause codes" in detail

http://www.cisco.com/warp/public/129/isdn_disc_code.html

Alog with "debugging Q931" at

http://www.cisco.com/warp/public/471/isdn_q931_ts.html

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