Xref: utzoo comp.dcom.modems:4019 comp.protocols.misc:598 Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!anise!salt.acc.com!lars From: lars@salt.acc.com (Lars J Poulsen) Newsgroups: comp.dcom.modems,comp.protocols.misc Subject: Re: Protocol BSC 2780/3780 ??? Keywords: BiSync 2780 Message-ID: <817@anise.acc.com> Date: 17 Jun 89 05:31:23 GMT References: <63935@yale-celray.yale.UUCP> Sender: news@anise.acc.com Reply-To: lars@salt.acc.com.UUCP (Lars J Poulsen) Followup-To: comp.protocols.misc Organization: Advanced Computer Communications, Santa Barbara, California Lines: 30 In article <63935@yale-celray.yale.UUCP> jacquemin-michel@CS.YALE.EDU (Michel Jacquemin) writes: >Can anybody tell me anything about communication protocols named BCS >2780 and BCS 3780, supposedly described in the IBM brochure >GA27-3063-3 ? (1) This question legitimately belongs in comp.protocols.misc, not comp.dcom.modems. I have redirected followups to comp.protocols.misc ! (2) The IBM2780 and IBM3780 Remote Job Entry systems are terminals consisting of a card reader, a line printer and an optional card punch. They speak EBCDIC over half-duplex modems, using a framing protocol called BSC (Binary Synchronous Communications) or BiSynC for short. Though these devices are three times obsolete (first for being oriented to batch data processing; second for using 80-column punched cards; third for using half-duplex BSC instead of full-duplex SNA) they live on in virtual memory as the lowest common denominator for connecting word processors of 1980 vintage to IBM mainframes. >Also, does anything called "V26 LSI" exist? What is it? (3) V.26 is a CCITT standard for some type of modem. Since I'm posting from home, I don't have my standards book handy. If it's for use with the above, it's probably a half-duplex 4800 bps over two-wire circuit phase-shift-keyed modem. / Lars Poulsen (800) 222-7308 or (805) 963-9431 ext 358 ACC Customer Service Affiliation stated for identification only My employer probably would not agree if he knew what I said !!