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- Newsgroups: comp.dcom.modems
- Path: sparky!uunet!rde!ksmith!keith
- From: keith@ksmith.uucp (Keith Smith)
- Subject: Modem Interfaces (was: Re: Serial and Parallel interface ??????)
- Organization: Keith's Computer, Hope Mills, NC
- Date: Thu, 30 Jul 92 03:15:29 GMT
- Message-ID: <1992Jul30.031529.4188@ksmith.uucp>
- References: <clemon.08ii@lemsys.UUCP> <1992Jul24.015453.19377@ksmith.uucp> <clemon.08ls@lemsys.UUCP>
- Lines: 53
-
- In article <clemon.08ls@lemsys.UUCP> clemon@lemsys.UUCP (Craig Lemon VE3XCL) writes:
- >In article <1992Jul24.015453.19377@ksmith.uucp> keith@ksmith.uucp (Keith Smith) writes:
- >>Hahaha,
- >>
-
- KEEPING in mind the discussion is for alternatives to RS-232 modem
- interfaces ala a PC parallel port.
-
- >>Can you say ETHERNET, TOKEN RING? All SERIALLY transmitted data.
- >
- >Hahahahaha, yes I can. Can you say SHIELDED CABLE, RF FREQUENCIES? Maybe
-
- Yes, but sheilded cable is not neccessary for very short runs, and
- twisted pair 10baseT is available. The RF problem is a problem at ANY
- Speed, An RS-232 cable can really hose up a TV. A parallel cable is
- often times even worse. Try setting an FM radio next to an UNSHIELDED
- printer cable.
-
- >you can also say HIGH-PERFORMANCE DEDICATED PROCESSORS or ISA BUS
- >CONNECTION?
-
- Double big deal, You already are paying $400+ for a name brand V.32bis
- modem. What's another $100 for an ethernet circuit welded down on the
- card with a RISC CPU?
-
- >
- >>Not Likely ISDN is gonna fly past 10 Mbits/sec, but I will agree that
- >>"standard" RS-232 is not going to go much past 115K.
- >
- > The way I understand it, ISDN is currently a 64kbps scheme. It may
- >have been updated to 128kbps by now (yes? no?). ISDN is also not "local
- >area" and must be considered quite different than Ethernet or RS-232. It
- >is going to be significantly slower than anything local, that can be taken
- >for granted. Utilizing ethernet allows a good LAN/WAN interface to an ISDN
- >"encoder" as well as guaranteed throughput.
-
- Agreed, In fact, I think 10baseT ethernet or RS-422 is the way to go for
- anything that exceeds the RS-232 Limits. The standards are in place
- already, and they offer a factor of bandwidth over any simple inexpensive
- WAN interface connection (modem, isdn, 56K leased line, etc).
-
- Now the day everyone get's fibre in the home, and their own T3 circuit
- we may begin to push 10baseT or RS-422 speed limits, but until then I
- think either would be a safe bet.
-
- The ethernet may cause some trouble at the CPU end though, with device
- drivers and the like. I'm just not sure there's gonna be a lot of
- DEMAND for this kind of bandwidth though.
-
- --
- Keith Smith uunet!ksmith!keith 5719 Archer Rd.
- Digital Designs BBS 1-919-423-4216 Hope Mills, NC 28348-2201
- Somewhere in the Styx of North Carolina ...
-