Date: Fri, 26 Feb 1999 09:32:24 -0000 From: "James Van Vleet" <jamesvv@ibm.net> To: <freebsd-questions@FreeBSD.ORG> Subject: RE: FreeBSD as a serial mux? (Serial <-> FreeBSD <-> WAN <-> FreeBSD <-> Serial) Message-ID: <000401be616a$eabf8440$4cc05c8b@javlaptop.dms-corp.co.uk> In-Reply-To: <36D6C0B5.FA7907C8@luciamar.k12.ca.us>
next in thread | previous in thread | raw e-mail | index | archive | help
I already have the routers. I even have two serial multiplexors. What I wanted to avoid was around $5100 (includes year use) for a second leased line. I looked around, and it looks like a TDM would cost enough to make it easier (and possibly cheaper) to go with a second line. Since what needs to be done is read whatever data is on one port, send it to the second machine, then send it out it's port, I am wondering if this has been done before or what pointers I can get to make it work. If I have this solution, then I already have all the pieces I need and avoid a second line just to support some old terminals. Part of the issue is that these terminals will be gone in about 10-12 months anyway. I hate to buy more hardware (or a second line) that will be useless to me after a year. I have no doubt I could write a solution for FreeBSD and perhaps I will if there is not an existing way. I would need to make it work pretty quick though... -James > -----Original Message----- > From: owner-freebsd-questions@FreeBSD.ORG > [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of David Knapp > Sent: Friday, February 26, 1999 3:42 PM > To: jvanvleet@sei-it.com; c > Subject: Re: FreeBSD as a serial mux? (Serial <-> FreeBSD <-> WAN <-> > FreeBSD <-> Serial) > > > We didn't use FreeBSD, although I think you could to replace a > router. We replaced our 56kb lease lines with ISDN lines in order to > allow tcp/ip traffic. However, we still have terminals in place at > some locations. So, in order to allow both serial and tcp/ip > connections over the same ISDN line, we put in Time Division > Multiplexors (TDMs) on each side. So we have a 3 connector TDM with > one side going to the router (Engage) one side goes to the ISDN modem > (Adtran), and one side going either to the DTC (for our HP3000) or to > the serial MUX at the remote site. I don't see why you couldn't > replace the routers in this example with freebsd machines, but I don't > know of any way to use FreeBSD as a MUX. Also, I forget which brand > of TDM we use, but we had a number that were unreliable and cause me > some grief in troubleshooting. > > hth > > dbk > > > James Van Vleet wrote: > > > > I found this question a few times in my mailing list > searches, but couldn't > > find an answer. If I have the wrong mailing list, please let me know. > > > > Is there a way to use FreeBSD as a serial mux? What I > want to do is > > replace an existing leased line that is connected to serial multiplexers > > with a more modern WAN (TCP/IP) connection. The downside is > that I still > > need to provide the serial muxing connection. So really what I > need is a > > way to remotely run some terminals that are proprietary enough > to not have > > emulation, as in serial in one server and serial out the other > server. This > > seems useful enough that I would be surprised is someone has not already > > done it (without requiring expensive terminal servers!) Any thoughts or > > suggestions are appreciated. > > > > -James > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > -- > David Knapp 805 473-4353 > PC Network Specialist dknapp@luciamar.k12.ca.us > LMUSD "Everyone knew her as Nancy" F.T. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?000401be616a$eabf8440$4cc05c8b>