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GB/T 46923-2025Professional digital trunking communication systems based on 12.5 kHz TDMA channels - General technical requirements (English PDF)

基于12.5kHz信道的时分多址（TDMA）专用数字集群通信系统　总体技术要求

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

April 1, 2026

Scope

GB/T 46923-2025 is the English-translated version of 基于12.5kHz信道的时分多址（TDMA）专用数字集群通信系统　总体技术要求.

GB/T 46923-2025 is the Chinese standard "Professional digital trunking communication systems based on 12.5 kHz TDMA channels - General technical requirements".

Its scope clause reads: This document specifies the technical characteristics and system architecture of a dedicated digital trunking communication system based on a 12.5kHz channel for Time Division Multiple Access (TDMA).

Functional requirements, operating frequency band, address and identification code, network management, basic performance indicators of channel equipment, AC power supply system, information security and Overall requirements include confidentiality, environmental and electromagnetic compatibility, and reliability.

This document applies to the planning, design, and implementation of dedicated digital trunking communication systems based on a 12.5kHz channel for Time Division Multiple Access (TDMA). acceptance. Its clauses include terms, definitions and abbreviations.

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Document preview — GB/T 46923-2025

National Standard of the People's Republic of China

ICS: 33.060.01
Classification: M 36

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms, Definitions, and Abbreviations
3.1 Terms and Definitions
3.2 Abbreviations
4.System Technical Characteristics
4.1 Basic Technical System
4.2 Basic System Services
4.3 Basic Protocols and Signaling
4.4 Working Method
4.5 Call setup time
5 System Composition and Functional Requirements
5.1 System Composition
5.2 Functional Definitions and Requirements
6.Frequency application range and number
6.1 Operating frequency band
6.2 Frequency number
7.Address and Identification Code
7.1 System Parameters
7.2 User ID and Address Definition
7.3 Internal wired number
8 Network Management
8.1 Basic Network Management Functions
8.2 Network Management Hierarchical Architecture
9 System Interconnection
9.1 PDT System Network Design
9.2 Peer-to-peer system interconnection network architecture
9.3 PDT Network Contact Address
9.4 Signaling for Interconnection between PDT Systems
9.5 Voice transmission protocol for PDT system interconnection
10.Basic performance indicators of channel equipment
10.1 Overview of Channel Equipment
10.2 Overall Performance Indicators
10.3 Base Station Radio Frequency Indicators
10.4 Handheld Radio Frequency Specifications
10.5 Vehicle-mounted radio frequency specifications
11 Secure Encryption
12 Electrical Safety
13 Power adaptability
14 Environmental and Electromagnetic Compatibility
14.1 Environmental adaptability
14.2 Electromagnetic Compatibility
15 Reliability
15.1 Channel Equipment Reliability
15.2 Reliability of Control and Link Equipment
16 Transportation and Packaging

1 Scope

This document specifies the technical characteristics and system architecture of a dedicated digital trunking communication system based on a 12.5kHz channel for Time Division Multiple Access (TDMA).

Overall requirements include confidentiality, environmental and electromagnetic compatibility, and reliability.

This document applies to the planning, design, and implementation of dedicated digital trunking communication systems based on a 12.5kHz channel for Time Division Multiple Access (TDMA).

acceptance.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 4208 Degrees of protection provided by enclosures (IP code)

GB/T 9254.1-2021 Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers – Part 1.Emission requirements

GB/T 13426-1992 Reliability requirements and test methods for digital communication equipment

GB/T 14013 Transport Packaging for Mobile Communication Equipment

GB/T 17626.2 Electromagnetic compatibility testing and measurement techniques - Electrostatic discharge immunity test

GB/T 34991 Air Interface Physical Layer of Dedicated Digital Trunking Communication System Based on Time Division Multiple Access (TDMA) Channel (12.5kHz) and data link layer technical specifications

GB/T 34992 Air Interface Call Control for Dedicated Digital Trunking Communication System Based on 12.5kHz Channel Time Division Multiple Access (TDMA)

Layering Technical Specifications

GB/T 46922 System Interconnection Technology for Dedicated Digital Trunking Communication Systems Based on Time Division Multiple Access (TDMA) Channels (12.5kHz) specification

3 Terms, Definitions and Abbreviations

3.1 Terms and Definitions

The following terms and definitions apply to this document.

3.1.1 sudden burst

A finite number of consecutive bits in a physical channel.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

GB/T 46920-2025Professional digital trunking communication systems based on 12.5 kHz TDMA channels - Technical requirements for security

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