Historical
ANSI T1.401.03-1998
Network to Customer Installation Interfaces - Analog Voicegrade Switched Access Lines with Calling Number Delivery, Calling Name Delivery or Visual Message Waiting Indicator Featuring
This standard provides the signaling and data transmission requirements associated with the Calling Number Delivery (CND), Calling Name Delivery (CNAM), and Visual Message-Waiting Indicator (VMWI) features when one or more of these features are provided on an analog voicegrade switched access line. When the network provides the CND feature, the CNAM feature, or both the CND and CNAM features, an on-hook customer installation (CI) receives analog frequency-shift keying (FSK) data messages that identify the caller's number, the caller's name, or both the caller's number and name. When the network provides the VMWI feature, an on-hook CI receives FSK messages that activate or deactivate a CI visual message-waiting indicator. This standard is intended to be used in conjunction with ANSI T1.401-1993.
Alliance For Telecommunications Industry Solutions [atis]