alxfed@plasma.gpi.msk.su (Alexander V. Fedotov) (03/13/91)
Can anybody tell me, where can I find the COMPLETE description of compression and error correction algorithms used in MNP lev.5. I have to include a software implementation of this algorithms into my noncomercial product, but I can't find them. Are they licensed to Microcom or can I get this description for free? Where? ................................................................... : Alexander V. Fedotov Research Associate : : Plasma Phys. Division, General Physics Institute, Moscow, SU : : INET: alxfed@plasma.gpi.msk.su Voice: +7 095 132-8216 : : FAX : +7 095 135-0270 : :.................................................................:
tnixon@hayes.uucp (03/14/91)
In article <ABWjWtd4gH@plasma.gpi.msk.su>, alxfed@plasma.gpi.msk.su (Alexander V. Fedotov) writes: > Can anybody tell me, where can I find the COMPLETE description of compression > and error correction algorithms used in MNP lev.5. I have to include a software > implementation of this algorithms into my noncomercial product, but I can't > find them. Are they licensed to Microcom or can I get this description for > free? Where? A definition of the error control scheme (MNP 2-4) is available in Annex A of CCITT Recommendation V.42. You can also get documentation from Microcom, for about US$100. MNP5, however, involves patents held by Microcom. You must contact Microcom for information on licensing these patents, even if you could get documentation (and they're really the only source for that, anyway). The contact is: Gregory Pearson Microcom, Inc. 15303 Ventura Blvd., Suite 900 Sherman Oaks, CA 91403 USA Voice: +1 (818) 986 4212 Fax: +1 (818) 986 4214 Email: 71330.1625@compuserve.com -- Toby Nixon, Principal Engineer | Voice +1-404-840-9200 Telex 151243420 Hayes Microcomputer Products Inc. | Fax +1-404-447-0178 CIS 70271,404 P.O. Box 105203 | UUCP uunet!hayes!tnixon AT&T !tnixon Atlanta, Georgia 30348 USA | Internet hayes!tnixon@uunet.uu.net
necka@motcid.UUCP (William J. Necka) (03/16/91)
In article <ABWjWtd4gH@plasma.gpi.msk.su> alxfed@plasma.gpi.msk.su writes: >Can anybody tell me, where can I find the COMPLETE description of compression >and error correction algorithms used in MNP lev.5. I have to include a software >implementation of this algorithms into my noncomercial product, but I can't >find them. Are they licensed to Microcom or can I get this description for >free? Where? MNP is copyrighted by Microcom. If I remember correctly, they want about $200 for the error handling protocols and much more for MNP5. This may have changed, since V.42. The CCITT often looks down on standards which are built around proprietary protocols. I think it has something to do with giving the owner of the copyright an unfair advantage. Although, they would probably claim that $200 really is not that unfair. I know that when the CCITT was looking at a v.42bis compression standard, Microcom was pushing MNP7. At that time, they were offering a "C" implementation of MNP7 that could be run on a PC. This was to be used to compare compression results of MNP7 and the other compression algorithms being proposed. They may have similar programs to demo MNP5. _______________________________________________________________________________ ------------------------------------------------------------------------------- -- x || William Necka - __/ \__/\/\/\/ \____ Motorola Cellular || uunet!motcid!necka / \__/ \ _/ [][\_ Arlignton Heights Il. || Opinions expressed are not \__/ \__/ (________) 708-632-4435 || necessarily my employer's. _____\__/__________()__()________________________||____________________________ -------------------------------------------------------------------------------