FED-STD-1005A

Abstract

This standard establishes coding and modulation requirements for 2,400 bit/s modems owned or leased by the Federal government for use over analog transmission channels other than those derived from high-frequency radio facilities. It is based upon techniques described in CCITT Recommendations V.22 bis, V.26, and V.26 bis. <br>This standard is to facilitate interoperability between telecommunication facilities and systems of the Federal government. <br>This standard shall be used by all Federal agencies in the design and procurement of 2,400 bit/s modems for use with switched or dedicated nominal 4 kHz channels with the following exception. Secure (i.e. encrypted) voice terminals conforming to North Atlantic Treaty Organization (NATO) Standardization Agreement 4291 may deviate from the requirements of this standard.