Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!samsung!usc!zaphod.mps.ohio-state.edu!rpi!batcomputer!cornell!uw-beaver!milton!sumax!thebes!camco!bill From: bill@camco.Celestial.COM (Bill Campbell) Newsgroups: comp.dcom.modems Subject: Re: Best modem protocol summary? (Correct me if I'm wrong) Message-ID: <1099@camco.Celestial.COM> Date: 25 Jun 91 14:53:51 GMT References: Organization: Celestial Software, Mercer Island, WA Lines: 29 In clemon@lemsys.UUCP (Craig Lemon) writes: : So after all of this discussion it would seem that the best modem :to get for throughput, good reliability and future compatibility would be a :V.32bis/V.42bis box right? Also, refresh my memory, what is the bis on :V.32? The 14400 carrier instead of 9600? (I know that V.42bis is data :compression). I may well be doing it wrong, but the best data rates I've been able to get recently using real data (pre-compressed) and V.42bis modems is about 600cps. This is between a couple of UDSV3242B modems with interface speed locked at 38,400 on Specialix 8-port boards. My PEP modems regularly get 1400-1700cps with interface locked at 19,200. I get similar speeds (600cps) between the UDS and my T1600 with both locked @ 38.4. I've seen reports of transfer rates > 1,400 cps with V.42bis (Stuart Lynne on a SLIP connection). Is this because of the compression or is there something I'm missing that will get real speed with V.42bis on compressed data? Bill -- INTERNET: bill@Celestial.COM Bill Campbell; Celestial Software UUCP: ...!thebes!camco!bill 6641 East Mercer Way uunet!camco!bill Mercer Island, WA 98040; (206) 947-5591