Cisco 2821 w/ 4-port ISDN NM-4B-U in China, no B-Channel found
Hi, i?ve got a Cisco 2821 with 4-port ISDN NM-4B-U card (Integrated NT-1) directly connected to ISDN in China. For some reason i can?t place a call, always receive error "ISDN BR1/0 **ERROR**: host_disconnect_ack: Unfound B-channel on Disconnect". Once customer places own Cisco router (unknown model/IOS) with NM-4B-S/T card to an external NT-1 ate same ISDN lines he can establish calls without any problems. My Router has an IOS 12.4(9)T1. Is there any special config requested to get this working? Thnx for all feedback in advance, Andreas.
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