martyne@batcomputer.tn.cornell.edu (Martyne Hallgren) (11/14/89)
When I think of implementing SLIP between machines, I generally assume that I will be using an analog circuit and modems. Can a DDS circuit with appropriate CSU/DSUs be used instead?? and if not, why not?? Has anyone done this?? Thanks in advance. ************************************************************************ * Martyne M. Hallgren Internet: martyne@tcgould.tn.cornell.edu * * Technical Advisor Bitnet: martyne@crnlthry * * Cornell Theory Center Phonenet: 607-255-9397 * * 265 Olin Hall * * Ithaca, NY 14853 * * * *" The mind, once expanded to the dimensions of larger ideas, never * * returns to its original size." -Oliver Wendell Holmes * ************************************************************************
amanda@intercon.com (Amanda Walker) (11/14/89)
In article <9289@batcomputer.tn.cornell.edu>, martyne@batcomputer.tn.cornell.edu (Martyne Hallgren) writes: > When I think of implementing SLIP between machines, I generally assume > that I will be using an analog circuit and modems. Can a DDS circuit > with appropriate CSU/DSUs be used instead?? and if not, why not?? In general, SLIP only needs a full-duplex 8 bit wide channel in order to operate. Asynchronous serial happens to be the most common such channel for most people, but as long as both sides can talk to the media, there's no reason you couldn't run SLIP over a DDS, or for that matter, a bidirectional parallel port :-). Amanda Walker InterCon Systems Corporation -- @
dab@asylum.SF.CA.US (Dave Bridgham) (11/15/89)
The issue isn't analog vs. DDS but async vs. sync. Generally when you get up to DDS speeds (56kbps) you're using synchronous interfaces on the ends. SLIP provides framing. Synchronous interfaces usually will do the framing for you in hardware (either HDLC, SDLC, or BiSync) so SLIP is redundant. David Bridgham