Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!henry From: henry@utzoo.UUCP (Henry Spencer) Newsgroups: net.dcom,net.periphs,net.news Subject: Re: 9600 full-duplex, by trickery? Message-ID: <4602@utzoo.UUCP> Date: Thu, 8-Nov-84 14:21:59 EST Article-I.D.: utzoo.4602 Posted: Thu Nov 8 14:21:59 1984 Date-Received: Thu, 8-Nov-84 14:21:59 EST References: <4468@utzoo.UUCP> Organization: U of Toronto Zoology Lines: 18 A friend of mine helpfully called UDS and gave them my name for an information packet on their modems. It came today. The news isn't really terribly good. The "9600 A/B" is indeed a 9600-baud dialup half-duplex modem, and the "EC100" will indeed make it look full- duplex provided the aggregate bidirectional traffic stays below the actual half-duplex line throughput. The modem matches CCITT V.24, with fallback speeds of 7200 and 4800. The EC100 has 4KB of buffer and does CRC and an acknowledgement protocol. Now the bad parts. First, the modem does not speak 212 or 103, so there is no backward compatibility on a phone line fitted with one of these. Second, the modem does not autodial, so you'll need a separate autodialer box (UDS will happily sell you one). And third, after you add up the price tags, equipping one phone line with modem, EC100, and dialer comes out at US$3100. Oh well. -- Henry Spencer @ U of Toronto Zoology {allegra,ihnp4,linus,decvax}!utzoo!henry