North American Telephone Network Transmission Model for Evaluating Analog Client and Digitally Connected Server Modems
Edition 2001-01

Telecommunications Telephone Terminal Equipment Transmission Requirements for Narrowband Digital Telephones
Edition 2006-11-03

Telecommunications - Telephone Terminal Equipment - Performance and Interoperability Requirements for Voice-over-IP
Edition 2006-03

A Frequency Shift Keyed Modem for Use on the Public Switched Telephone Network
Edition 2003-04

Minimum Performance Standards for Text Telephone Signal Detector and Text Telephone Signal Regenerator
Edition 2001-09

Telecommunications Telephone Terminal Equipment Stutter Dial Tone Detection Device Performance Requirements
Edition 2011-06-24

Telecommunications Telephone Terminal Equipment Technical Requirements for Connection of Terminal Equipment to the Telephone Network
Edition 2009-08-11

Telecommunications Telephone Terminal Equipment Technical Requirements for Connection of Terminal Equipment to the Telephone Network
Edition 2010-03-12

Telecommunications Telephone Terminal Equipment Technical Requirements for Connection of Terminal Equipment to the Telephone Network-Addendum 1
Edition 2012-06-22

Telecommunications Telephone Terminal Equipment Technical Requirements for Connection of Terminal Equipment to the Telephone Network- Addendum 2
Edition 2015-01-21