ron@vsedev.VSE.COM (Ron Flax) (01/26/88)
The subject pretty much sums things up.. I can connect two machines at 9600 baud over a hardwired connection just fine, but when I put two Telebit Trailblazer modems in between I am unable to establish a session of any kind. The modems are set up in PEP mode, but ALL asynchronous protocols have been disabled. I have tried setting data compression on/off, but there is no difference. I can however use the modems with tip/cu to dial each computer and work interactively at 9600 baud, but I cannot get a SLIP connection to work. -- ron@vsedev.vse.com (Ron Flax) uucp: ..!uunet!vsedev!ron inet: vsedev!ron@uunet.uu.net
jbvb@ftp.UUCP (James Van Bokkelen) (01/27/88)
I tried to reply to your first message directly, but somebody didn't know the back-path. The SLIP we were using (ours) with the Trailblazers implements CTS modem control (optionally), and the Telebits needed it to work at 19.2. Aside from being a little jumpy due to a bit of a mis-match between the underlying half-duplex packet size the Telebits were using, and uncompressed SLIP datagrams, it all worked fine. James VanBokkelen FTP Sotware Inc.
karn@thumper.bellcore.com (Phil R. Karn) (02/05/88)
I simply assert RTS and DTR in my asynch driver and leave them on; I do not do any form of RTS/CTS flow control. I just don't think it should be necessary, because TCP does its own end-to-end flow control. If a pseudo-full-duplex modem can't spare enough memory to buffer even one typical TCP window, then that's the modem's problem. I use V.32 modems (true 9600 bps full duplex) and they work great! Phil Karn, KA9Q