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Topic: Media Gateway Controller

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	Media gateway - Wikipedia, the free encyclopedia
		Media Gateways enable multimedia communications across Next Generation Networks over multiple transport protocols such as ATM and IP.
		Media Gateways are controlled by a Media Gateway Controller (also known as a Call Agent or a Soft Switch) which provides the call control and signaling functionality.
		Communication between Media Gateways and Call Agents is achieved by means of protocols such as MGCP or Megaco or H.248 or SIP.
	en.wikipedia.org /wiki/Media_gateway (338 words)

	bouwen-megaco-isdn-01.txt
		For these ISDN access gateways, the ISDN B channels may be controlled by the Media Gateway Controller using megaco/H.248 while the User-to-Network signaling running over the D channels may be relayed to the Media Gateway Controller using the Sigtran protocols.
		This implies the call control signaling, which is transported in the SCN over the D-channel as Q.931 messages, has to be relayed from the Media Gateway to the Media Gateway Controller and vice versa.
		7.3 Megaco/H.248 controlled SCTP stream set-up In this scenario the set-up of the SCTP association is controlled by the Media Gateway Controller.
	ietfreport.isoc.org /idref/draft-bouwen-megaco-isdn (3772 words)

	Roxen Community: RFC 3525 Gateway Control Protocol Version 1 (Standards Track) (Site not responding. Last check: 2007-10-16)
		Media Gateway Controller (MGC): Controls the parts of the call state that pertain to connection control for media channels in a MG.
		In contrast, the mode of a Termination (send/receive/...) describes the flow of the media at the ingress/egress of the media gateway.
		The MGC can also use the priority to control autonomously the traffic precedence in the MG in a smooth way in certain situations (e.g., restart), when a lot of Contexts must be handled simultaneously.
	community.roxen.com /developers/idocs/rfc/rfc3525.html (13292 words)

	elliott-ipdc-media-00.txt
		The media gateway may be capable of acting as a voice over IP gateway, voice over ATM gateway, dialup modem media gateway, circuit switch, or cross- connect.
		If the media gateway has filled the event buffer before the script indicates that the buffer should be reported, then the expected media gateway behavior is to report the full buffer to the soft switch and then start a new event buffer to hold any new event indications.
		This AVP is passed to the media gateway along with AVPs which specify the script itself and the scripting language used by the script.
	ietfreport.isoc.org /idref/draft-elliott-ipdc-media (7084 words)

	MEGACO based Media Gateway Framework from Flextronics Software Systems for Next Generation Networks
		Media Gateway (MG) Framework implements the media mapping and transformation function identified in the decomposed Gateway architecture proposed by ETSI TIPHON and adopted by IETF.
		Media Gateway Framework is a portable software building block that can be used to build different types of gateway platforms in the converged next generation networks.
		The Media Gateway framework is designed as an integrated unit that provides external interfaces to hardware and DSP firmware as well as functionality for configuration, control and management.
	www.hssworld.com /voip/frameworks/mediagateway/mediagateway.htm (498 words)

	[No title]
		The key distinctions are between gateway entities at the edge of the network, centralized call processing entities such as H.323 Gatekeepers performing Gatekeeper-routed signalling in the interior of the network, and signalling endpoints such as H.323 clients in the interior of the VoIP network.
		A Media Gateway Controller which discovers that a connection is required to another Media Gateway Controller attempts to connect and must main- tain the connection indefinitely.
		In the event of glare (two Media Gateway Controllers attempting to establish a socket simultaneously), the Media Gateway Controller with the lower valued IP address yields and closes its socket.
	www.cs.columbia.edu /sip/drafts/draft-thomas-sigtran-igsp-00.txt (3975 words)

	SS7/IP Interworking Tutorial: Signaling in Switched Circuit and VoIP Networks, Page 2 (Site not responding. Last check: 2007-10-16)
		Media Gateway: A media gateway terminates voice calls on inter-switch trunks from the public switched telephone network, compresses and packetizes the voice data, and delivers compressed voice packets to the IP network.
		The signaling gateway may terminate SS7 signaling or translate and relay messages over an IP network to a media gateway controller or another signaling gateway.
		A media gateway, signaling gateway or media gateway controller (softswitch) may be separate physical devices or integrated in any combination.
	www.pt.com /tutorials/iptelephony/tutorial_voip_signaling.html (910 words)

	Bluetooth - Wikipedia, the free encyclopedia
		Wireless control of and communication between a cell phone and a hands free headset or car kit.
		This profile is designed to provide a standard interface to control TVs, Hi-fi equipment, etc. to allow a single remote control (or other device) to control all of the A/V equipment that a user has access to.
		It is hoped that mobile phones could use a Bluetooth CTP gateway connected to a landline when within the home, and the mobile phone network when out of range.
	en.wikipedia.org /wiki/Bluetooth (5346 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		A media gateway is a network element that provides conversion between the information carried on telephone circuits and data packets carried over the Internet or over other IP networks.
		Examples of media gateways are: * Trunking gateways that interface between the telephone network and a Voice over IP network.
		This working group assumes a separation of call control so the call control "intelligence" is outside the media gateways and handled by a media gateway controller.
	sunsite.utk.edu /ftp/pub/ietf/megaco/megaco.txt (374 words)

	Media Gateway to Media Controller Protocols > Introduction (Site not responding. Last check: 2007-10-16)
		The simple gateway control protocol (SGCP) was introduced in early May 1998 by Cisco during a PacketCable™ meeting (later in other standards bodies, IETF, ITU-T SG 16 and ETSI TIPHON) as a cost-effective alternative and better suited protocol to implement and deploy than current H.323 implementations in the context of the cable operators’ market.
		It is important to note that all the media gateway to media gateway controller protocols emphasize the interworking of network elements introduced in these new proposals with H.323 network elements.
		The term ‘device control protocol’ represents the media gateway controller to media gateway protocol.
	www.informit.com /articles/article.asp?p=99707&seqNum=4 (3214 words)

	MGCP (Media Gateway Control Protocol) (Linktionary term) (Site not responding. Last check: 2007-10-16)
		MGCP is a protocol that operates between a media gateway and a media gateway controller, allowing the media gateway controller to control the media gateway.
		MGCP is defined in RFC 2705 (Media Gateway Control Protocol Version 1.0, October 1999).
		A media gateway and a media gateway controller are components of softswitch architecture.
	www.linktionary.com /m/mgcp.html (157 words)

	Media Gateway Controller (MGC) - Techabulary (Site not responding. Last check: 2007-10-16)
		gateway is comprised of at least two components: one component that deals with call signaling on the
		VoIP network and one component that deals with bearer control on the PSTN side of the gateway.
		If the gateway is decomposed into two parts, separating the call control function from the bearer control function, then the part that controls the call control is referred to as a "Media Gateway Controller".
	www.techabulary.com /m/mgc.html (146 words)

	Voice over IP (VoIP) (Linktionary term)
		The gateway is subdivided into a signaling gateway (mediates signals between IP and the switched circuit networks), a media gateway (connects two different networks and performs translations), and the media gateway controller (translates and maps signaling information among the different networks).
		RFC 2705 (Media Gateway Control Protocol, October 1999) provides a general description of the media gateway/media gateway controller model.
		It describes an architecture in which the call control "intelligence" is outside the media gateways and handled by media gateway controllers (also called "call agents").
	www.linktionary.com /v/voip.html (3814 words)

	SVI_MGC SS7 Media Gateway Controller
		The SVI-MGC provides a media gateway controller that controls third party media gateways (Cisco, Audiocodes, Nuera, Lucent, Inalp, etc) to provide them with SS7 capabilities and to control routing for all protocols on the media gateway including ISDN, R2 and CAS allowing for comprehensive PSTN breakout to VoIP networks.
		The media gateway provides the TDM to VoIP media conversion whilst the SVI-MGC provides all call control protocol termination controlling the media path setup via the standard MGCP or MEGACO media gateway control protocols.
		The MG provides all.htmlect of media conversion terminating all TDM bearers and providing progress tones and prompts under the direct control of the MGC using media control protocols like MGCP or MEGACO.
	www.squire-technologies.co.uk /products/svi-mgc.html (481 words)

	[No title]
		Transmit: Positive ACK is received from the Media Gateway Controller Receive: Positive ACK is sent to the Media Gateway Controller.
		The purpose of setting the restart timer before sending the Restart In Progress notification to the media gateway controller is to avoid the network congestion during the critical period of service restoration.
		The UDP port is used together with xgcpMGCCfgAddress to specify the destination address of the default Media Gateway Controller to which RSIP message is sent when system starts up or line goes up.
	www.icir.org /fenner/mibs/extracted/XGCP-MIB-nguyen-01.txt (1603 words)

	[No title]
		This document is the MIB module which defines managed objects for managing implementations of the External Media Gateway Control Protocol such as SGCP [16] and MGCP [17].
		SGCP/MGCP is a protocol used between a Media Gateway Controller and a Media Gateway in a VoIP network, where the Media Gateway Controller uses SGCP/MGCP to control the media gateway connected through an IP network.
		In the SGCP/MGCP model, call control intelligence resides in the Media Gateway Controller and outside of the media gateway.
	www3.ietf.org /proceedings/99nov/I-D/draft-nguyen-xgcp-mib-01.txt (3257 words)

	media gateway - a definition from Whatis.com (Site not responding. Last check: 2007-10-16)
		As defined in the Internet Engineering Task Force (IETF) Request for Comments (RFC) 3015, a media gateway might terminate channels from a circuit-switched network (such as a DSO) as well as streaming media from a packet-switched network such as RTP streams in an IP network.
		Data input could be audio, video, or T.120 (real-time multi-point communications), which the media gateway would handle simultaneously.
		The media gateway controller is sometimes called a softswitch.
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci812104,00.html (199 words)

	Media Gateway Toolkit for Next Generation Networks
		Multiple Gateway Control protocols exist today in different stages of evolution necessitating selection of the right protocol for current product definitions and an easy migration path to support new protocols.
		FSS' offering for Media Gateway solutions is available in different packages that provide flexibility to pick the solution that best meets customer requirements.
		A higher value solution is offered through the Media Gateway (MG) Toolkit that hides the syntactic and semantic details of protocol processing from the application.
	www.hssworld.com /voip/stacks/MediaGatewayToolKit/overview.htm (239 words)

	PC acting as the Media Gateway Controller (MGC) (Site not responding. Last check: 2007-10-16)
		This PC controls the MGs under its domain through the MGCP protocol, and establishes RTP sessions, for the transport of voice, between different MGs.
		In the MGCP framework, the MG doesn't control the endpoint at its own discretion, but simply passes on the signaling information to the MGC and then responds to the commands sent to it by the MGC.
		Thus the MGC is notified of status information of the endpoints, like offhook, onhook, digits, etc., and in turn instructs the MG to provide ring, ringback, busytone, etc., to the appropriate endpoint.
	poisson.ecse.rpi.edu /~anand/voip/reports/1stage/html/node6.html (151 words)

	Softswitches—Part V: Media Gateway Control Protocol
		Communication between the media gateway controller and the media gateway is required in order to interconnect the logical side and physical sides of the softswitch architecture.
		That communication is accomplished in a master/slave arrangement, whereby the media gateway controller sends commands to the media gateway by the use of one of two protocols.
		The second protocol used for communication between the media gateway controller (call agent) and the media gateway, is called the MEGACO/H.248 standard, which will be the subject of our next tutorial.
	www.voipplanet.com /backgrounders/article.php/3562441 (698 words)

	Motorola Computer Group Launches Megaco Software to Speed Media Gateway Deployment
		The management application interface is designed to enable users to add custom features to enhance the functionality of their media gateway.
		A combination of multiple gateways managed from a single gateway controller is capable of replacing a Class 5 local switch.
		The principles of the Megaco protocol are that the media streams end in terminations that are connected by placing them into a context.
	www.realtime-info.be /VPR/layout/display/pr.asp?PRID=3915 (419 words)

	Cisco Media Gateway Controller Software - Products & Services - Cisco Systems
		The Cisco MGC software is part of several solutions that perform call processing, protocol conversion, and call switching and routing functions.
		The Cisco MGC host interconnects Cisco media gateways to a circuit-switched time-division multiplexing (TDM) network, which offloads the signaling to an out-of-band network so that available bandwidth increases.
		In release 9 of the Cisco MGC software, the Cisco PGW 2200 (previously the Cisco VSC3000 or Cisco SC2200) provides a unified interconnection for dialup services, MGCP, SIP, and H.323, allowing service providers to deploy and operate multiple network solutions while maintaining a stable interconnection to the PSTN
	www.cisco.com /en/US/products/sw/voicesw/ps1913 (207 words)

	MGC - Media Gateway Controller
		The Museums and Galleries Commission was the national advisory body that existed to safeguard and promote UK museums and galleries.
		The MCG was merged with the Libraries and Information Commission on 1st April 2000 to create Resource.
		Every attempt has been made to provide you with the correct acronym for MGC.
	www.auditmypc.com /acronym/MGC.asp (110 words)

	SecurityTracker.com Archives - (Cisco Media Gateway Controller OS is Affected) Re: Sun Solaris 'cachefsd' Cached NFS ...
		Cisco reports that the operating system shipped with Cisco Media Gateway Controller may be vulnerable.
		Cisco reports that the Media Gateway Controller itself is not vulnerable, but the underlying operating system supplied by Sun may be vulnerable.
		For MGC and related products, if you have applied the script from CSCO013.pkg you are protected and you do not have to apply this workaround.
	www.securitytracker.com /alerts/2002/Jul/1004820.html (1428 words)

	Media Gateway Control Protocol Architecture and Requirements (RFC2805)
		Media Gateway Control Protocol Architecture and Requirements (RFC2805)
		This document describes protocol requirements for the Media Gateway Control Protocol between a Media Gateway Controller and a Media Gateway.
		Control Protocol between a Media Gateway Controller and a Media
	www.priorartdatabase.com /IPCOM/000003404 (116 words)

	Cisco Media Gateway Controller Release 7 Documentation
		Provides procedures on how to install the Cisco MGC hardware components that you can use to connect your packet data network to the Public Switched Telephone Network (PSTN).
		Lists and describes media gateway controller (MGC) configuration parameters, and provides instructions for creating a configuration.
		Cisco Media Gateway Controller Node Manager Release 1.5
	www.cisco.com /univercd/cc/td/doc/product/access/sc/rel7 (358 words)

	Proposed IETF Working Group: MEdia GAteway COntrol (megaco) (Site not responding. Last check: 2007-10-16)
		A new IETF working group has been proposed in the Transport Area.
		The following Description was submitted, and is provided for informational purposes: The working group will develop an informational RFC detailing the architecture and requirements for controlling Media Gateways from external control elements such as a Media Gateway Controller.
		Planned output: * Architecture and Requirements informational RFC * Standards Track RFC for the protocol between a media gateway controller and a media gateway.
	www.cctec.com /maillists/ietf/msg04269.html (393 words)

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