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GB/T 28524-2012Media gateway control protocol (MGCP) (English PDF)

媒体网关控制协议（MGCP）

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 29, 2012

Implementation date

October 1, 2012

Scope

GB/T 28524-2012 is the English-translated version of 媒体网关控制协议（MGCP）.

GB/T 28524-2012 fixes the requirements for the Media Gateway Control Protocol (MGCP) used for communication between a media gateway and a media gateway controller or softswitch device, covering the call model, the commands, the protocol message format, the sending of protocol requests, state and fault switchover and out-of-order handling, the protocol security requirements, the heartbeat mechanism and the packages.

Clause 1 states that it applies to media gateways, including IP trunking media gateways, ATM trunk media gateways, integrated access media gateways, integrated access devices and intelligent terminals such as IP phones that support MGCP, and to media gateway control devices and softswitch equipment.

The body is arranged as Scope, Normative references, Terms and definitions and abbreviations, Call Model, Command, protocol message format, protocol transfer request, status and fault switching and out of order, Protocol security requirements, heartbeat mechanism and package.

The call model clause covers endpoints and their identification, calls and connections, resource management and connection properties, local connections, MGC naming, the DigitMap, packages, and events and signals, while the command clause specifies the EndpointConfiguration, NotificationRequest, Notify, CreateConnection, ModifyConnection, DeleteConnection, AuditEndpoint, AuditConnection and RestartInProgress commands together with the response and error codes and the restart cause values.

The security clause covers the carriage of MGCP protocol messages over IPsec and an authentication mechanism, both marked optional, and the protection of media connections, while the heartbeat mechanism of clause 10 is also marked optional.

Normative Appendix A gives the ABNF syntax of the protocol and normative Appendix B the basic packages, among them the basic media, DTMF, MF, trunk circuit, analog line, cordless phone, RTP, network access server, notification server and script packages; the informative annexes cover operating requirements for media gateways and media resource servers, the communication processes between media gateway and media gateway controller, the authentication mechanism, the fax package and the permanent event package.

Clause 2 cites YDN065, IETF RFC 1034, IETF RFC 2821, IETF RFC 4301, IETF RFC 4302 (2005), IETF RFC 4303 (2005), IETF RFC 4566 and IETF RFC 5234. It was issued on 2012-06-29 and has applied since 2012-10-01.

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Document preview — GB/T 28524-2012

National Standard of the People's Republic of China

ICS: 33.040.30
Classification: M 12

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

Introduction
1 Scope
2 Normative references
3 Terms and definitions, abbreviations
3.1 Terms and definitions
3.2 Acronyms
4 Call Model
4.1 Overview
4.2 endpoint
4.3 Endpoint identification
4.4 Call and Connection
4.5 Resource Management and connection properties
4.6 local connection
4.7 MGC naming
4.8 DigitMap
4.9 package (Package)
4.10 events and signals (EventandSignal)
5 Command
5.1 Overview
5.2 EndpointConfiguration command
5.3 NotificationRequest command
5.4 Notify command
5.5 CreateConnection command
5.6 ModifyConnection command
5.7 DeleteConnection command
5.8 AuditEndpoint command
5.9 AuditConnection command
5.10 RestartInProgress command
5.11 response code and error codes
5.12 Restart Cause value
6 24 protocol message format
6.1 Overview
6.2 Command head
6.3 response headers
7 protocol transfer request
7.1 Overview
7.2 "At-Most-Once" mechanism
7.3 TransactionID 35 and three-way handshake
7.4 retransmission timing mechanism
7.5 The maximum packet length protocols
7.6 Message transfer 36 carries
7.7 Provisional Response
8 status, fault status 36 switching and out of order
8.1 Overview
8.2 MGC fault switchover
8.3 Communication with the media gateway
8.4 retransmission detecting association lost
8.5 out of order for
9 Protocol security requirements
9.1 Overview
9.2 Ipsec transfer MGCP protocol message (optional)
9.3 Protection of media connections
9.4 authentication mechanism (optional)
10 heartbeat mechanism (optional)
10.1 Overview
50
10.3 MG heartbeat mechanism control
11 package (package)
Appendix A (normative) The standard protocol described in ABNF syntax
A.1 ABNF syntax definitions
Appendix B (Normative Appendix) MGCP protocol basic package
B.1 Overview
B.2 Basic Media Pack
B.3 DTMF package
B.4 MF pack
B.5 trunk circuit pack
B.6 analog line package
B.7 cordless phone package
B.8 RTP packet
B.9 network access server package
B.10 Notification Server package
B.11 script package
Appendix C (Informative Appendix) MGCP protocol media gateway and media resource server operating requirements
C.1 Overview
C.3 media resource server operating requirements
Annex D (informative) --- Media Gateway Media Gateway Controller Communications Process
D.1 MGC restart process
D.2 media gateway registration process
D.3 media gateway cancellation process
D.4 call setup process
D.5 call release procedure
D.6 T.38 fax process
Annex E (informative) Media Gateway Media Gateway Controller authentication mechanism ---
E.1 Overview
E.2 authentication process
E.3 Authentication Extension
Annex F (informative) fax package
F.1 Overview
F.2 fax package
Annex G (informative) permanent event package
G.1 Overview
G.2 permanent event

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. The standard by the China Communications Standards Association.

1 Scope

This standard specifies the use MGCP protocol for communication between the media gateway and media gateway controller (or softswitch) when you want to Requirements, including the call model, command protocol message formats, protocols send request, state failure and switching out of order, the security protocol requirements, heartbeat Mechanisms and other aspects of the package contents.

This standard applies to the media gateway (including IP trunking media gateways, ATM trunk media gateways, integrated access media gateways, integrated access The equipment and support MGCP IP phones Intelligent Terminal), media gateway and softswitch equipment control devices.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

YDN065 Ministry of Posts and telephone exchange equipment technical specification

IETFRFC1034 Domain. Concepts and Facilities (Domainnames-Conceptsandfacilities)

IETFRFC2821 Simple Mail Transfer Protocol (Simplemailtransferprotocol)

IETFRFC4301 IP Protocol Security Mechanism (Securityarchitecturefortheinternetprotocol)

IETFRFC4302 (2005) IP Authentication Header (IPAuthenticationheader)

IETFRFC4303 (2005) IP Encapsulating Security Payload (IPEncapsulatingsecuritypayload (ESP))

IETFRFC4566 SDP. session description protocol (SDP. Sessiondescriptionprotocol)

IETFRFC5234 ABNF syntax rules (AugmentedBNFforsyntaxspecifications. ABNF)

3 Terms and definitions, abbreviations

3.1 Terms and Definitions

The following terms and definitions apply to this document.

3.1.1 Softswitch

Is one of the core packet network equipment, it is mainly to complete the call control, control, media gateway access resource allocation, protocol processing, routing, recognition Card, billing and other major features, and can provide basic voice services to users, mobile services, multimedia services, and other business.

3.1.2 MGC

Responsible for media gateway and media channel connection control part related to call state control.

3.1.3 Media Gateway

A network of the media into another media format required by the network. For example. the media gateway can be in the circuit switched network Convert between bearers and packet network media streams can handle audio, video or T.120 agreement to be equipped to handle these three Any combination of the ability of persons, capable of full duplex media translations, can demonstrate video/audio messages, to realize other IVR functions, can also be For media conferences.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 84 pages — is available in the English PDF.

Referenced standards

Normative references

YDN 065

Similar standards

GB/T 28500-2012|GB/T 28506-2012|GB/T 15838-2008|GB/T 47323-2026|GB/T 47742.1-2026|GB/T 47742.2-2026

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