Xref: utzoo alt.bbs.waffle:1873 comp.dcom.modems:9741 Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uwm.edu!psuvax1!rutgers!bobsbox!graphics!bobl From: bobl@graphics.rent.com (Bob Lindabury - SysAdm) Newsgroups: alt.bbs.waffle,comp.dcom.modems Subject: Re: Why HST's and UUCP don't mix (was Re: uucico and HST) Message-ID: <8TXZ25w164w@graphics.rent.com> Date: 15 May 91 16:18:54 GMT References: Organization: The Graphics BBS (2D,3D,GIF,Animation) +1 908/469-0049 Lines: 35 otto@tukki.jyu.fi (Otto J. Makela) writes: > This is fortunately incorrect. One of the best features of V.42bis is that i > can (unlike MNP5) disable the compression if it would make things worse. I'm > not sure if it can do this when connected to a MNP5 modem, but I doubt it. > I believe the comp.dcom.modems folks can clear things up here ? If you connect to another V.42bis modem, it will disable compression if a file can't be compressed thusly avoiding the MNP5 compression of a file that is actually a little larger than the original compressed file. If a V.42bis modem connects to a MNP5 (remember, we are only talking compression schemes here) then the V.42bis modem *can* (some manufacturers didn't build in a fallback to an MNP5-like compression scheme) fallback to MNP5-type compression. My Hayes Ultra 96 does this with the Alternate compression protocol that is MNP-5 compatible. However, you are once again stuck with 2:1 compression and no checking for pre-compressed files sizes. In most cases, I would imagine that the V.42bis should be on and active as all sites transfer some files that are not compressed. News may be compressed but mail isn't. You might as well get that compression savings on the mail files. As for the news, I don't believe you will lose much if anything using a V.32 modem with V.42bis compression enabled. I haven't tested out the actual cps rates in different modes because I haven't felt that it was worth the time and effort since I am getting reasonable rates as it is. -- Bob The Graphics BBS 908/469-0049 "It's better than a sharp stick in the eye!" ============================================================================ InterNet: bobl@graphics.rent.com | Raven Enterprises UUCP: ...rutgers!bobsbox!graphics!bobl | 25 Raven Avenue BitNet: bobl%graphics.rent.com@pucc | Piscataway, NJ 08854 Home #: 908/560-7353 | 908/271-8878