Multicast communication between a single sender and multiple receivers on a network. The media gateway control protocol architecture is a methodology of providing telecommunication services using decomposed multimedia gateways for. It implements the media gateway control protocol architecture for controlling media gateways connected to the public switched telephone network pstn. In the gateway configuration files, physical interfaces are typically identified.
Cisco media gateway control mgc node manager software is a cisco element manager for the fault, configuration, and performance management of the cisco pgw 2200 softswitch. Separation of media and call control n advantages of separation n media conversion close to the traffic source and sink n the callhandling functions is centralized. Gateway selection, design issues, feature configuration, and security and highavailability issues are all covered in depth. Mgcp is a masterslave protocol that allows a callcontrol device such as cisco callmanager to control and track the state of each voice port on the gateway. Mgcp and megaco gateways between ip telephony and pstn. Media gateway call agent uses mgcp to establish and control media sessions with other multimedia endpoints. Media gateway control protocol mgcp the wireshark wiki. This document will show how mgcp can be used to control a residential gateway in the megaco call flow test case 1, which considers a voice over ip gateway with directly subtending dtmf. Pdf media gateway control protocol architecture and. Media gateway control protocol mgcp, also known as h. Users can control number of dumb terminals in the media gateway through scripts.
Us7194071b2 enhanced media gateway control protocol. Mgcp is defined in an informational nonstandard ietf document, rfc 3435, which obsoletes an earlier definition in rfc 2705. With the network protocol it can control each specific port on a media gateway. Pdf media gateway control protocol architecture and requirements.
Apparatus and method for coordinating user responses to a call processing tree. Media gateway control protocols specify a masterslave architecture for decomposed gateways. Rfc 2705 media gateway control protocol mgcp version 1. Notifications request, notification, create connection, modify connection, delete connection, auditendpoint, auditconnection and restartinprogress.
The exemplary embodiments of the present invention provide ectf s. The media gateway control protocol mgcp organizes the communication between a media gateway controller, or call agent, and a media gateway, e. Mgcp assumes a call control architecture where the call control intelligence is. Internet engineering task force christian huitema internet. Media gateway control protocol mgcp an implementation of the media gateway control protocol architecture1 for controlling media gateways on internet protocol ip networks and the public switched telephone network pstn. This controller is called a media gateway controller mgc or call agent ca. The media gateway control protocol architecture, methodologies and programming interfaces are described in rfc 2805 media gateway control. Mgcp has the advantage of centralized gateway administration and provides for scalable ip telephony solutions. This happens when callcontrol devices use a plaintext protocol, mgcp, to manage ip telephony gateways. Introduction this document describes an abstract application programming interface mgci and a corresponding protocol mgcp for controlling media gateways from external call control elements called media gateway controllers or call agents. The media gateway controller is the master server, and one or more media gateways are the slave clients that behave like simple switches. Sep 29, 2005 cisco media gateway control mgc node manager software is a cisco element manager for the fault, configuration, and performance management of the cisco pgw 2200 softswitch. Multifunction device a device of peripheral that exposes one or more functions or services to an end user. Media gateway control protocol free download as word doc.
Abstract this document defines the protocol used between elements of a physically decomposed multimedia gateway, i. Media gateway control protocol mgcp fundamentals provides indepth coverage of voip and mgcp. This happens when call control devices use a plaintext protocol, mgcp, to manage ip telephony gateways. The media gateway control protocol mgcp is a signaling and call control communications. It is commonly known as a media gateway or media server. Universal serial bus communications class subclass. One media gateway controller can serve many media gateways. Media gateway control protocol gateways cisco unified. The avaya g450 media gateway is a multipurpose media gateway that can be deployed in medium to large sized branch locations or in wiringclosets servicing buildings and floors, in a campus environment. This document provides example of mgcp usage by providing a variety of call flows, in the case of. Media gateway control protocol mgcp is a protocol used for controlling voice over ip voip gateways from external call control elements.
Media gateway control protocol mgcp package registry. Every ethernet frame contains both a source and destination address, both of which are mac addresses. The dialogic controlswitch system is an imsready media gateway control function mgcf ngn class 4 softswitch that provides a smooth migration path from existing tdm voice networks to the nextgeneration networkip multimedia subsystem ngnims by enabling the interconnection of a mix of traditional and ims sipbased voice networks. Mac address media access control address is more specific than an ip address and cannot be changed because it is specific to each network hardware device. Rfc 2705 media gateway control protocol mgcp october 1999 1. Mgcp, described as informational rfc 2705, has been widely deployed. The mgc initiates the call control and signaling functionality by sending signaling information to the media gateway mg. The protocols help to set the standards for any type of voice or visual activity that takes place during the conference. Abbreviated as mgc, media gateway controller is a system used in some voip architectures. A media gateway is used to convert the data from a format thats used on pstn. Rfc 3435 media gateway control protocol mgcp version 1.
Rfc 2705 media gateway control protocol mgcp october 1999 the interface section presents a conceptual overview of the mgcp, presenting the naming conventions, the usage of the session description protocol sdp, and the procedures that compose mgcp. This system is composed of a call agent, that may or may not be distributed over several computer platforms, and of a set of gateways, including at least one media gateway. At the same time, some aspects of media gateway control protocol also aid in the recording of the audio and visual activity during the. Cisco 300075 exam tutorial, 300075 practice questions, 100%.
Media gateway control protocol or mgcp is the usual set of protocols that are utilized during a live session in a multimedia conference. Used by governments, military and major equipment manufacturers for nearly a decade, it is now available and recommended for application and equipment manufacturers. The bestknown media gateway control protocols are currently media gateway control protocol mgcp and megacoh. Media gateway control protocol mgcp 20020930 20625.
The protocol defines a means of communication between a media gateway, which converts data from the format required for a circuitswitched network to that. Mgcp media gateway control protocol masterslave protocol between media gateway controllers mgc and media gateways mg maintains close control over devices such as telephones supports users and their subscribed features main function. Media gateway communications protocol is used to implement a network element that provides conversion between the audio signals carried on telephone circuits and data packets carried over the internet or over other packet networks. Media gateway control and the softswitch architecture. Mac address a 6octet number representing the physical address of the nodes on an ethernet network. Introduction to mgcp media gateway control protocol. Mgcp ietf rfc 2705 is a masterslave protocol that allows a call control device cucm to take control of a specific port on a gateway.
Media gateway control protocol protokoll wikipedia. Jul 10, 2019 mgcp is a plaintext protocol used by call control devices to manage ip telephony gateways. The media gateway control protocol mgcp is a signaling and call control protocol used between the media gateway controller mgc and media gateway mg. Mgcp is a plaintext protocol used by callcontrol devices to manage ip telephony gateways. Encryption of voice traffic mgcp was the first gateway protocol to support the encryption of voice traffic using srtp in a ciscobased network. This media server can be used in applications like ivr, pbx, voicemail servers. Media gateways controllers control media gateways by means of a media gateway control protocol. This document describes an application programming interface and a corresponding protocol mgcp which is used between elements of a decomposed multimedia gateway. It uses the session description protocol sdp for specifying and negotiating the media streams to be transmitted in a call session and the realtime transport protocol rtp for framing the media streams. Media gateway control protocol architecture wikipedia. The advantage of this is that it creates a centralized gateway administration and provides for largely scaleable. Mar 20, 2007 enhanced media gateway control protocol. Conversion, the specific function should include one or more of the following. A media gateway controller exchanges messages with central office switches via a signaling gateway.
Qsig functionality when connecting to a pbx using qsig, mgcp bripri backhaul enables the decoding of facility ie messages by the callmanager. Media gateway control protocol mgcp fundamentals tonex. Gateway performance decreases by approximately 3540% if caching is disabled entirely. The media gateway control protocol mgcp is used to control gateways that provide access to the public switched telephone network pstn, and vice versa.
Mgcp ietf rfc 2705 is a masterslave protocol that allows a callcontrol device cucm to take control of a specific port on a gateway. The media gateway control protocol mgcp is used to control gateways that. Megaco combines concepts from mgcp and the media device control. Internet definitions of media gateway control protocol. The media gateway control protocol is a lightweight telephony protocol that promises reduced complexity and increased reliability for digital internet phones.
The media gateway control protocol can be used to control different types of endpoints, such as residential gateways, trunking gateways or packet relays. Multiple choice questions of computer networking 31. The media gateway control protocol nc state university. The media gateway control protocol mgcp is a signaling and call control communications protocol used in voice over ip voip telecommunication systems. Media gateway control protocol mgcp package registry created 20020930 last updated 20625 available formats xml html plain text.
Mgcp is the emerging protocol that is receiving wide interest. Enhanced media gateway control protocol intel corporation. Cisco 300075 exam tutorial, 300075 practice questions. The block responsible for implementing the media access control functions of the ethernet specification. The gateway control protocol is an implementation of the media gateway control.
Pdf this document describes protocol requirements for the media gateway control protocol between a media gateway controller and a media gateway. Mgc handles the registration and management of resources at the media gateway. In doing so, this protocol provides a method for communication on a network to go out onto a normal telephone system, and for communications from the pstn to reach computers and other devices. Mgcp is the emerging protocol that is receiving wide interest from both the voice and data industries. The media gateway control protocol architecture and its methodologies and programming interfaces are described in rfc 2805 mgcp is a masterslave protocol in which media gateways mgs are controlled by a call control agent or softswitch. Media gateway control protocol mgcp, commonly known as h. Linden is a senior software engineer at netspeak where he works on advanced telephony software for ip networks. Cisco mgc node manager integrates management access to all signaling components, effectively representing them as a signaling system 7 ss7 node to the network operator. The mgc uses mgcp to instruct mg about the events, media, signals to be played on endpoint, to create a connection, and to audit the status of the endpoints and connections involved in the. Used by governments, military and major equipment manufacturers for nearly a decade, it is now available and recommended for application and equipment manufacturers for. This is an opensource ims compliant media gateway resource function mrf. This chapter describes how mgcp functions and how you implement it using cisco callmanager as the call agent. System and method for providing and using universally accessible voice and speech data files. A simpler and more reliable voice over the internet.
The decomposed multimedia gateway consists of a call agent, which contains the call control intelligence, and a media gateway which contains the media functions, e. Download latest actual prep material in vce or pdf format for cisco exam preparation. The abundant examples, screen shots, configuration snips, and case studies make this a truly practical and useful guide for anyone interested in the proper implementation of gateways and gatekeepers in a voip network. The protocol presented in this document meets the requirements for a media gateway control protocol as presented in rfc 2805. Streaming protocol an overview sciencedirect topics.
708 1030 225 744 1486 876 218 1295 229 776 1134 518 39 250 1209 990 67 1452 974 293 468 397 1265 1557 82 424 80 860 618 44 509 971 994 1426 1150 1405