Behaviour on TCP disconnect

[admin]

Do you know what commands the BBS is sending to the modem and what it should be expecting? Typically, this type of problem is due to the BBS not receiving something that it expects to see. It could be that the BBS is sending some odd (unsupported) modem command and that is generating ERROR as a return. It could also be a stacked command (ie. ATZ0H0M0.. etc. where commands are all put together) that is not supported in the immediate mode. The only way to really diagnose these types of problems is by using a serial sniffer program or by connecting the serial port to another serial (via hardware) and watching the data.

I have no idea what "netcat" is. The WiModem232 supports RAW and TELNET modes.