I see a very strange problem with our ISDN slot on c2600 and can't somehow explain it.
If I connect a normal ISDN phone the line is working perfectly but if I connect ISDN port on our router then ISDN status shows:
#sh isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI1/0 interface
dsl 0, interface ISDN Switchtype = basic-net3
Layer 1 Status:
Layer 2 Status:
Layer 2 NOT Activated
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
and I can't start a connection, I've tried with help of "isdn test call", it shows an error like "no B chanel available"
If I make an incoming call to the telephone number of that ISDN line then the status of the line changes to "MULTIPLE_FRAME_ESTABLISHED" and I can use the line just normal for Dialer connections.
After some period of time (sometime is hours, sometimes is only a minutes) the Line status goes again to "DEACTIVATED" and Dialer connection doen't work until I place an incoming call.
The ISDN Hardware is:
BRI S/T - 2186 WAN daughter card
Hardware revision 1.3 Board revision A0
Serial number 19923810 Part number 800-01833-03
FRU Part Number WIC-1B-S/T=
no ip address
dialer pool-member 3
isdn switch-type basic-net3
isdn outgoing display-ie
no cdp enable
router version is 2600-advipservicesk9-mz.124-2.T.bin
I can see the same problem on two different locations, where we use this type of hardware.
Please give some advise. may there is a kind of "keepalive" for BRI interfaces?