TIA TIA-102.BAHA

Abstract

This document defines a Conventional Fixed Station Interface (CFSI). The CFSI is the interface between a conventional fixed station, which is defined in this document as a functional component of a Fixed Station Subsystem, and a Conventional Fixed Station Host (CFSH). A CFSH is defined in this document as a functional component of either an RF Subsystem (RFSS) or a Console Subsystem.¹ Clause 6 describes these elements and their relationship to each other. For the purposes of this scope statement, a fixed station may be either an "analog fixed station" or a "digital fixed station". An "analog fixed station" supports conventional FM RF resources or their equivalent. A "digital fixed station" supports the P25 Common Air Interface (CAI) for P25 conventional systems (see [8]). <br>This document fully describes the CFSI including its architecture (clause 6), and protocols (clauses 7 and 8). Clause 7 describes a basic analog audio and control interface, while clause 8 describes a more capable Internet Protocol (IP) (see [1]) based digital interface. This interface has been designed to work with IPv4. Use of this interface with IPv6 is for further study. <br>The functional scope of the CFSI as described herein comprises the following CFSI Analog and CFSI Digital Interface provisions. <br>The CFSI Analog Interface provides: <br>1. Transport of clear audio between a fixed station and its host² providing capabilities for full-duplex, half-duplex and simplex communications at the discretion of the fixed station. <br>2. Transport of E&M control signaling between a fixed station and its host to provide a simple "Push-to-talk" and "COR" capability. <br>3. Transport of Tone Remote Control (TRC) control signaling from a host to a fixed station to provide a variety of control functions including transmit channel control, squelch control, monitor control, clear/secure controls, analog/digital mode controls, etc. <br>4. A primitive "Intercom" capability allowing for the transport of audio between the fixed station and its host without initiating an RF transmission. <br>The CFSI Digital Interface provides: <br>1. IP based capabilities equivalent to those provided via the Analog Interface. <br>2. Transport of encrypted audio between a digital fixed station and its host. <br>3. Transport of Caller-ID information between a digital fixed station and its host. This includes Unit ID from field units to consoles, and "Console ID" from consoles to field units. <br>4. Transport of Talk-group information between a digital fixed station and its host. <br>5. Transport of NAC code information between a digital fixed station and its host. <br>6. Transport of Emergency Alert messages from the digital fixed station to its host. <br>7. Transport of Emergency indications along with the voice stream between the digital fixed station and its host. <br>8. Transport of Received voter identification from the digital fixed station to its host. <br>9. Advanced Control of the Fixed Station by its host including the disabling of all squelch (monitor function). <br>10. A standard option to transport intercom audio to and from the fixed station location. <br>¹For the purposes of this document the CFSI is defined as a specialization of the generic Project 25 Fixed Station Interface (FSI) described in TSB102-A (see [19]). <br>² Throughout this document the terms "Host" or "host" refer to the CFSH as defined in this document.