Channel Access Time 1 : The time lapse from activation of a radio transmitter's push-to-talk (PTT) switch to the receiving unit's speaker emitting audio
NFPA 1221 Standard for the Installation, Maintenance, and Use of Emergency Services Communications Systems, 2007 ed. (Std: Install, Maint, and Use of Emr Srvc Commun - Amer) {391 NFC}