I have cisco 3620 router which i want to use as a dialup router. after configuring it, the PRI link from telco is up but the problem i faced is that when i dial the PRI number which is 308888 i am getting busy tone. it seams the modem refuses the call. from the trace i took i am getting this cause ( Cause i = 0x80AC - Requested circuit/channel not available).
attachment is the result of the following commands:
sh interface Serial1/0:15
sh controller E1 1/0
debug isdn q931
sh isdn service
sh isdn status
any help about this problem is highly appreciated.