Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!bionet!arisia!cdp!caulkins From: caulkins@cdp.UUCP Newsgroups: comp.dcom.modems Subject: Re: CCITT Standards Message-ID: <1111100001@cdp> Date: 8 Jan 90 18:53:00 GMT References: <1517814371@1990Jan8.005244.13932@herbert.uu> Lines: 43 Nf-ID: #R:1990Jan8.005244.13932@herbert.uu:1517814371:cdp:1111100001:000:1019 Nf-From: cdp.UUCP!caulkins Jan 8 10:53:00 1990 Here are the modem-level CCITT V numbers that I know: V.22 1200/600 bps FDX V.23 1200/600 bps HDX V.26 2400 bps 4W V.26 bis 2400/1200 bps HDX V.26 ter 2400/1200 bps FDX V.27 4800 bps 4W V.27 bis 4800/2400 bps 4W V.27 ter 4800/2400 bps FDX V.29 9600 bps 4W V.32 9600/4800 bps FDX V.33 14.4 kbps V.35 48 kbps 4W V.36 48 kbps 4W V.37 72 kbps 4W These were taken from a wall chart showing a great many X., V., and other standards mapped against the 7 ISO layers; the chart shows the rather tangled interrelated nature of the standards. It is from: Retix 2644 30th St Santa Monica, CA 90405-3009 (213)399-2200 Also check your local University technical library; I am fortunate in being close to Stanford, which has most of the CCITT standards. If all else fails you can go direct to the sources: International Organization for Standardization and International Telecommunications Union both in Geneva, Switzerland. Unfortunately this takes time and the books are quite expensive. Dave C