henning@agnes.uucp (Mark D. Henning) (09/13/89)
Hello, all you hardware people in netland, I have a duesy! St. Olaf has just opened its newest dorm for residence, and WOW, what a neat place. We have two intelligently plaved phone jacks in the room as well as "computer" rj11 jack immediately above them. The computer jacks are not connected to anything but the punchdown block in the homerun room for the telephone trunk. I checked with telecomunications and they are hooking my and a neighbor's "computer" jacks with a jumper in the homerun room. My problem is this: They only have 2 wires (BY pair I assume) which is just dandy if you have a Mac phonenet system. However, This is just about useless for RS232 communication. (which the college gets by using 3 wires; tran. rec. gnd.) The run between our rooms is about 300 feet total including the jumper. How can we get the signals through. My supervisor (I work with Electronic Services) sugested I go half-duplex and hook up a transiever to multiplex the rec. and trans. lines onto one line and then use the second for reference ground. However, I'm not sure this idea would work at speeds of 56kbaud or so. Any Ideas will be appreciated, and I will post a compilation of the responses. Thanks in advance, Mark Henning --------------------------------------------- All opinions are my own, as are the spellings any deviation from the norm is just an effect of my deviance.
ckp@grebyn.com (Checkpoint Technologies) (09/13/89)
In article <5776@thor.acc.stolaf.edu> henning@agnes.uucp (Mark D. Henning) writes: >Hello, all you hardware people in netland, > > [Asks how to achieve cmmunication with only two wires] Get your hands on a Black Box catalog and check for a suitable Short Haul Modem (SHM). Lemme check mine... Well, you can pick up cheap ones for $130 that will run up to 19,200 baud. 57K? Checking... Faster ones are Sync, not Async (RS232 is async). (Black Box: 412-746-5565 [tech support], 412-746-5530 [ordering]. Call 'em and ask for a catalog.)