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From: Terry Lambert <terry@cs.weber.edu>
Newsgroups: comp.protocols.kermit.misc,comp.unix.bsd.bsdi.misc
Subject: Re: Kermit D/L through a hybrid Asynch-to-Telnet card
Date: 9 May 1995 16:51:02 GMT
Organization: Utah Valley State College, Orem, Utah
Lines: 41
Message-ID: <3oo6hm$s00@park.uvsc.edu>
References: <3omjv4$qjc@news.rain.org> <3onoff$c4i@apakabar.cc.columbia.edu>
NNTP-Posting-Host: hecate.artisoft.com
fdc@watsun.cc.columbia.edu (Frank da Cruz) wrote:
]
] In article <3omjv4$qjc@news.rain.org>,
] Tom Towle <towle@ceo.sbceo.k12.ca.us> wrote:
] : Here's a weird one. We have a BSDI Pentium hooked up over Ethernet to a
] : card called a VLAN card by a company named Penril. Our dial-in users
] : come in over an asynchronous connect ports to multiplexers, (made by the
] : same company), and then are trunked over hi-speed synchronous data lines
] : to this half-serial, half-ethernet card, and then they get a Telnet
] : connection to our Unix box. For the dial-up connection, everthing seems
] : to work fine, however, Kermit appears to be the only method available
] : for binary file transfer.
] :
] So what's the problem?
The problem is that he's effectively got a multidrop board with a
controller that looks like an ethernet card (but is probably actually
and RS422 card) and that he needs to make the connection between
the fan out unit on the other end of the cable from the PC and the
modems *binary* so he can do transfers with something *other* than
kermit. Probably so he can get SLIP or PPP going as well.
Most likely the problem is that the card is set for in band (XON/XOF)
flow control when it should be set for out of band (RTS/CTS) or the
modem is set that way or they both are.
I'm not sure if you could reset the card or not. Some of these
cards are mighty stupid. It might, in fact, be a jumper setting
in the fan out unit itself.
Note that this type of setup is typically done to make it cheap, so
it's entirely possible that there is insufficient buffering without
flow control to keep the fan out unit from losing data before it
gets shoved down the wire to the card in the box.
Terry Lambert
terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.