We are having a ccm setup with 4.1(3) with mgcp gateway. We are not able to make the calls to PSTN. But incoming calls from PSTN is working. I am getting requested circuit/channel not available error message in the debug as mentioned below.
VG#debug isdn q931
debug isdn q931 is ON.
Apr 27 14:39:39.854: ISDN Se1/0:15 Q931: TX -> SETUP pd = 8 callref = 0x00AF
Bearer Capability i = 0x8090A3
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98381
Exclusive, Channel 1
Calling Party Number i = 0x0081, '1069'
Called Party Number i = 0x80, '9940028908'
Apr 27 14:39:39.886: ISDN Se1/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x80AF
Cause i = 0x82AC - Requested circuit/channel not available
Display i = 'REQUESTED CHANNEL NOT AVAILABLE'
Checked all the troubleshooting logs. In all of them it was mentioned that it is a temporary problem.
Please let me know the solution if anybody has solved this problem.
Try to add this command in the ISDN Serial interface:
isdn bchan-number-order ascending
Try to use 'ascending' ot 'descending'.
Hope this helps,