I got my numbers from Cisco's Internetworking Terms and Acronyms (not that Cisco is always right ;-) It says RS-232 was limited to 64 Kbps and that RS 449 is 2 Mbps.
Here what that document says about RS-530: Refers to two electrical implementations of EIA/TIA-449: RS-422 (for balanced transmission) and RS-423 (for unbalanced transmission). I don't think the actual numbers matter to answer the fellow's question. The bottom line is that serial doesn't mean slow. Priscilla At 07:56 PM 4/16/02, Steve Watson wrote: >I believe you are incorrect. RS-232 supports up to 128k. RS-449 was the >successor to 232 but the mechanics and signaling were off so the RS-530 >was born to support up to 2mb and also supported the RS-232 >specifications. > >Steve > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of >Priscilla Oppenheimer >Sent: Tuesday, April 16, 2002 7:33 PM >To: [EMAIL PROTECTED] >Subject: Re: WAN - serial link and RS-232 serial link [7:41670] > >WANs (and LANs) use serial communication (one bit at a time). The only >thing I can think of that uses parallel communication is old-style >printers. > >A serial interface can still be very fast. On the WAN side, RS-232 only >supported speeds up to 64 Kbps. But RS-449 supports speeds up to 2 Mbps. > >Most WAN interfaces support RS-499, which is known as EIA/TIA-499 today. > >And then there's also HSSI which is 52 Mbps, and probably others that I >can't think of off the top. > >Priscilla > >At 07:01 PM 4/16/02, rtiwari wrote: > >Why WAN connection is called serial link. Is it same like > >RS-232 serial link. If it's same then at a time we can transmit > >only one bit.In this case WAN link will be having slower > >bit transmission. > >or WAN - serial link and RS-232 serial link are different. > >Please reply > >-Ravi >________________________ > >Priscilla Oppenheimer >http://www.priscilla.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41683&t=41670 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
