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- Path: sparky!uunet!sun-barr!news2me.ebay.sun.com!exodus.Eng.Sun.COM!appserv.Eng.Sun.COM!oobleck!bender
- From: bender@oobleck (Duke of Canterbury)
- Newsgroups: comp.dcom.modems
- Subject: Re: Serial and Parallel interface ??????
- Date: 29 Jul 1992 01:48:45 GMT
- Organization: SPARK's R US
- Lines: 18
- Message-ID: <l7bu7tINNlh@appserv.Eng.Sun.COM>
- References: <1992Jul24.015453.19377@ksmith.uucp>
- Reply-To: bender@oobleck.eng.sun.com
- NNTP-Posting-Host: oobleck
- X-Newsreader: Tin 1.1 PL3
-
- keith@ksmith.uucp (Keith Smith) writes:
- : 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.
-
- Why can't "standard" RS-232 go much past 115K? I think that the electrical
- specifications of "standard" RS-232 such as the receiver input capacitance
- and slew rate would cause the bit edges to start getting so mushy that
- accurate recovery would become much more difficult past a certain speed (I
- don't know what that speed is, but I'm sure there's someone on the net with
- an HP-41C all fired up and ready to calculate it).
-
- mike
-
- --
- The IQ requirement for being a phone operator may be pretty low, but the
- required IQ for placing a call is just about vegetable level. That's why
- they kill sardines before canning them; if you let them swim around in the
- can, it would heat up and explode.
-