Just picked up one of these: http://www.blackbox.com/Store/Detail.aspx/10-100-Terminal-Server-1-Port-RS-232-422-485-DB9-Male/LES4011A
Using it to interconnect an IP camera (ethernet-to-serial) to a uController. It has a simple web interface for configuration and serves telnet and some other daemons by default. It also supports several config profiles, one of which establishes a bidirectional tunnel once there is an incoming TCP connection to the terminal server. Using nc(1) on one machine I open a tcp connection to the terminal server; nc $terminal_addr $port Using cu(1) on a separate machine I open a line using the call-out device. When a character string is terminated with CR into nc(1), the packet is sent to the terminal server and exists out the serial port. When any character is entered into cu(1) it is instantly sent over IP through the open TCP connection. Hope this helps. On Sat, Feb 25, 2012, at 07:45 PM, Nico Kadel-Garcia wrote: > On Fri, Feb 24, 2012 at 12:01 PM, Dewey Hylton > <dewey.hyl...@gmail.com>wrote: > > > ----- Original Message ----- > > > From: "Henning Brauer" <lists-open...@bsws.de> > > > To: misc@openbsd.org > > > Sent: Thursday, February 23, 2012 10:45:52 AM > > > Subject: Re: ethernet-to-serial support > > > > > > * Dewey Hylton <dewey.hyl...@gmail.com> [2012-02-23 15:21]: > > > > i used the digi equipment over a decade ago with both hpux and aix > > > > with success. i'd really like to access these from my openbsd > > > > workstation and laptop, though the documentation mentions support > > > > for just about everything other than bsd. > > > > are any of these usable with bsd? and by that i mean can openbsd > > > > connect to the serial ports via ethernet with cu or something > > > > similar? > > > > > > i dunno the digi stuff, but console servers usually provide access to > > > the serial ports via telnet or ssh. in general you don't wanna expose > > > these to the 'net, but it's good enough for a seperate vlan or the > > > like to an openbsd box that you either run conserver on or just use > > > to > > > jump through. > > > > ahhh, and now it is clear to me how much 'smarter' these devices have > > become since i used them before. i'm relatively certain the ethernet > > connectivity was limited to 10Mbps, and i certainly don't remember any > > ssh options. that tidbit right there fixes all my worries. thanks! > > > > From personal experience, every schmuck and his brother thinks they can > whip such devices up out of el cheapo microcomputer cards, but after you > add up all the connectors and cabling and especially design time to get > it > *right*, it's usally worth the investment to just buy a commercial box > with > cables. Figure roughly $50/port with cabling, and you'll be in the right > price range. > > These are *invaluable* when testing kernel configurations. > > Byron Klippert byronklipp...@ml1.net (867) 332-4184
