I have a problem doing SFTP through ISDN, ISDN connection is not staying active throughout the duration of the file transfer, it drops after its timeout value even if data transfer is in progress and file transfer break at that point, this happens with sftp transfer only, other type of connection like telnet, rdp works fine. Intresting traffic list I have define is,
access-list 112 permit ip host 10.10.10.9 any. All the traffic is orignating from IP address 10.10.10.9
Any suggestion on that.