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ANSI C12.21-2006/IEEE P1702/MC1221 - Protocol Specification for Telephone Modem Communication
Author:
ANSI
Year:
2006
Abstract:

This document contains the details of the standard - ANSI C12.21-2006 which 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 some other electronic communications device.

More Information on this standard can be found here.

Document Type:
Standard Information Detail
Source:
NIST Twiki