jacquemin-michel@CS.YALE.EDU (Michel Jacquemin) (06/17/89)
Can anybody tell me anything about communication protocols named BCS 2780 and BCS 3780, supposedly described in the IBM brochure GA27-3063-3 ? Also, does anything called "V26 LSI" exist? What is it? Please answer to me as I am not a regular reader of this newsgroup. Thanks, Michel Jacquemin (jacquemin@cs.yale.edu, ...!harvard!yale!jacquemin) "Pour oublier les soucis de la vie antique, buvez du vin authentique" Asterix
lars@salt.acc.com (Lars J Poulsen) (06/17/89)
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 <lars@salt.acc.com> (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 !!
GPWRDCS@gp.govt.nz (Don Stokes, GPO) (06/26/89)
In article <817@anise.acc.com>, lars@salt.acc.com (Lars J Poulsen) writes: >>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. V26 is 2400 bps synchronous, half duplex, with 1200bps fallback, commonly used on dialup RJE/BiSynch links - not sure on the modulation (most likely phase shift). The LSI part probably refers to a particular make - several Philips & Sematrans (actually the same models) modems, including V26 models, have "LSI" in the name, and I think Racal put it in as well. Don Stokes, Systems Programmer / / Domain: don@gp.govt.nz Government Printing Office, /GP/ PSImail: PSI%0530147000028::DON Wellington, New Zealand / / UUCP: ...!munnari!vuwcomp!windy!gpwd!don -------------------------------------------------------------------------------- The first myth of management is that it exists.