Stage 1 Service Description for Personal Communications Service – Enhanced Priority Access and Channel Assignment (PACA-E) Supplementary Service (Formerly ATIS T1.706)
Scope and purpose A uniform@ nationwide approach is needed to ensure effective implementation of the wireless priority treatment. This standard defines and describes call set-up procedures for the Enhanced Priority Access and Channel Assignment (PACA-E) service for priority access as well as priority egress for Personal Communications Service (PCS) system. This standard defines the functionality required to support the PACA-E priority treatment supplementary service in a PCS Basic Call process. The information in annex A illustrates the incorporation of this service into the circuit-mode bearer service described in American National Standard for Telecommunications ?C Stage 1 service description for personal communications service ?C Circuit-mode bearer services: Basic processes@ ANSI T1.705-1995. This stage 1 PACA-E Service Description is limited to only call origination from a PACA-E subscriber (priority access)@ and separately@ call delivery to a PACA-E subscriber (priority egress). End-to-End PACA-E service@ including priority egress for a call originated from a PACA-E subscriber@ is for further study. A graphical representation of priority access@ priority egress@ and End-to-End priority service is provided in annex D. Application This service is intended to provide priority treatment to a subclass of PCS users (e.g.@ National Security and Emergency Preparedness (NS/EP) users) and defines a feature that is activated by a PACA-E subscriber originating or receiving a call. PACA-E will support up to 15 priority levels; the top five levels (1 being the highest) are reserved for NS/EP users. Emergency (911/E911) call requests may be assigned a priority level in accordance with federal/state law. Coordination between PACA-E and emergency service shall be maintained to provide capabilities consistent with use of the services as mandated by law.