Standards Publication

American National Standard for Protocol Specification for Telephone Modem Communication

ANSI NEMA C12.21-2006 (R2023) | Status: Active | ID: 100356

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.

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Published Date: January 07, 2024

Number of pages: 77

Staff Contact: Paul Orr

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Keywords

C12 C-12 C.12 C12.21 TELEPHONE MODEM COMMUNICATION AMERICAN NATIONAL STANDARD FOR PROTOCOL SPECIFICATION FOR TELEPHONE MODEM COMMUNICATION C12.21