1、T1.401.04-2000American National Standardfor Telecommunications-Network to Customer Installation Interfaces-Analog Voicegrade Switched Access Lines withthe Call Waiting,Distinctive Call Waiting,orCalling Identity Delivery on Call Waiting FeatureSecretariatAlliance for Telecommunications Industry Solu
2、tionsApproved January 13,2000American National Standards Institute,Inc.AbstractThis standard provides the signaling and data transmission requirements associated with Call Waiting(CW),Distinctive Call Waiting(DCW),and Calling Identity Delivery on Call Waiting(CIDCW)features onanalog voicegrade switc
3、hed access lines.When the network provides the CW or DCW feature,a customerinstallation(CI),while off-hook on an existing call,receives a CW alerting tone or a DCW alerting tone pat-tern when an incoming call is waiting to be answered.When the network provides the CIDCW feature,aCl,while off-hook on
4、 an existing call,receives a CW alerting tone and an analog frequency-shift-keying(FSK)data message or a DCW alerting tone pattern and an analog FSK data message when an incomingcall is waiting to be answered.This standard is intended to be used in conjunction with American NationalStandard for Tele
5、communications Interface Between Carriers and Customer Installations AnalogVoicegrade Switched Access Lines Using Loop-Start and Ground-Start Signaling,T1.401-1993,andAmerican National Standard for Telecommunications-Network to Customer Installation Interfaces-An-alog Voicegrade Switched Access Lines with the Calling Number Delivery,Calling Name Delivery,or Vi-sual Message Waiting Indicator Feature,T1.401.03-1998.
