This is an old revision of this page, as edited by Bschoeni (talk | contribs) at 23:37, 17 November 2009 (←Created page with 'ANSI C12.21 is the American National Standard for Protocol Specification for Telephone Modem Communication This standard details the criteria required for communic...'). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 23:37, 17 November 2009 by Bschoeni (talk | contribs) (←Created page with 'ANSI C12.21 is the American National Standard for Protocol Specification for Telephone Modem Communication This standard details the criteria required for communic...')(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)ANSI C12.21 is the American National Standard for Protocol Specification for Telephone Modem Communication
This standard details the criteria required for communications between a C12.21 device and a C12.21 client via a modem connected to the switched telephone network. The C12.21 client could be a laptop or portable computer, a master station system or another electronic communications device.