CHARLIE@UMVMA.BITNET (Charlie Turner) (05/07/91)
On Mon, 6 May 91 00:24:49 MDT <INFO-MODEMS-REQUEST@WSMR-SIMTEL20.ARMY.MIL> said: > >Date: 5 May 91 20:39:15 GMT >From: usc!samsung!nstar!larry@apple.com (Larry Snyder) >Subject: Re: CompuComm CSP modems 9600??? >Message-ID: <1991May05.203915.25477@nstar.rn.com> > >shihsun@roof.Princeton.EDU (Shih-ping S Sun) writes: > >>The CompuCom modem is $169 for the Sysop Deal, from what i undersatnd. >>They have a pretty large following in the WWIVnet (of which I am a >>sysop). In fact, one of our servers (@1021 in St. Louis) uses a >>CompuCom. They use a proprietary 9600 protocol, so a CompuCom will only >>do high speeds with another CompuCom. I am not sure that they will do >>38.4. All CompuCom boards are listed as 19.2 in the WWIvnet data files. > >what protocol do these modems use? Is it full duplex? The CompuCom sysop deal is $169 for the CSP modem plus fax transmit (normally a $249 product). I think $169 is the regular price for the CSP modem w/o fax. While the current product is an ISA internal PC modem, their literature says there will be an external modem product 'real soon now.' My speculation is that CompuCom has devised a way to get 'duplex' performance out of some kind of relatively inexpensive chip set (v.29 perhaps). I don't know if this is an asymetric scheme or a transmit/ receive line turnaround scheme. I too would be interested in knowing how it actually works. I briefly considered buying one of these for my personal use, but decided in the end that the multivendor interoperability offered by V.32 was worth the extra cost to me.