Jeff.Miller@samba.acs.unc.edu (BBS Account) (07/24/90)
Deos anyone know how to "null-modem" a pair of machines together using the 15 conductor standard? I only need to go a couple feet. I would assume if it is possible it would only work point-point. Also, I bet several manufacturers have wasted no time coming up with single-chip transceivers that need few external parts. Anyone familiar with any of these, know any part numbers, or know a source for small quantities? Thanks. * *** Please reply to me as cornhead@sutro.sfsu.edu, a more direct adress for me. *
bob@MorningStar.Com (Bob Sutterfield) (07/25/90)
In article <620@beguine.UUCP> Jeff.Miller@samba.acs.unc.edu (BBS Account) writes:
Does anyone know how to "null-modem" a pair of machines together
using the 15 conductor standard? I only need to go a couple feet. I
would assume if it is possible it would only work point-point.
Nope, you'll still need a transceiver, or its moral equivalent, for
each node. The bad news is that the initial investment just to get
two boxes talking on Ethernet is rather high. Your best bet will be
to buy two thin Ethernet transceivers, a hunk of RG58 coax, a pair of
BNC T-connectors, and a pair of 50 Ohm BNC terminators. The good news
is that you'll then have a fully-functional Ethernet on your desk,
with all the rights and privileges appertaining thereto. It will be
much easier to add the third box than if you had only created a "null
modem" transceiver cable.
Also, I bet several manufacturers have wasted no time coming up
with single-chip transceivers that need few external parts. Anyone
familiar with any of these, know any part numbers, or know a source
for small quantities?
See recent discussions in comp.sys.sun for lists of companies
producing very small (credit card size), very low-cost ($120-200)
thinnet transceivers. One of their big markets is for Sun
SPARCstations and SLCs with only AUI ports from the factory.