Overview of MGCP Commands in .NET framework

Creator Data Matrix 2d barcode in .NET framework Overview of MGCP Commands

Overview of MGCP Commands
Print Data Matrix 2d Barcode In VS .NET
Using Barcode encoder for .NET Control to generate, create Data Matrix 2d barcode image in .NET applications.
Data Matrix ECC200 Reader In VS .NET
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
MGCP defines nine commands, some of which are sent from call agent to gateway and some from gateway to call agent MGCP commands are composed of a command line, a number of parameter lines, and, optionally, a session description The command line and parameters are text, using the US-ASCII character set The session description uses SDP, also a text-based protocol The command line and the various parameters are separated from each other by a carriage return and line feed character (CRLF) The session description is separated from the command line and the various parameter lines by a single empty line, similar to the way things are done in SIP
Barcode Creation In VS .NET
Using Barcode creation for .NET framework Control to generate, create barcode image in .NET applications.
Barcode Recognizer In Visual Studio .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
Downloaded from Digital Engineering Library @ McGraw-Hill (wwwdigitalengineeringlibrarycom) Copyright 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website
ECC200 Generator In Visual C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
Draw Data Matrix 2d Barcode In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create Data Matrix 2d barcode image in ASP.NET applications.
Media Gateway Control and the Softswitch Architecture
Make Data Matrix ECC200 In VB.NET
Using Barcode generator for .NET framework Control to generate, create DataMatrix image in .NET framework applications.
Draw UPC Code In VS .NET
Using Barcode encoder for .NET framework Control to generate, create GTIN - 12 image in VS .NET applications.
Media Gateway Control and the Softswitch Architecture
Linear 1D Barcode Drawer In .NET Framework
Using Barcode creation for .NET Control to generate, create Linear image in VS .NET applications.
Painting Matrix Barcode In .NET Framework
Using Barcode creator for .NET Control to generate, create Matrix Barcode image in Visual Studio .NET applications.
The command line is composed of the requested verb (the name of the command), a transaction identifier, the endpoint for which the command applies (or from which the command has been issued), and the protocol version (MGCP 10) These four items are separated from each other by a space (SP) character Thus, the command appears as
Generating GS1 DataBar Truncated In Visual Studio .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create GS1 DataBar image in .NET framework applications.
EAN-8 Supplement 2 Add-On Generator In .NET Framework
Using Barcode generator for VS .NET Control to generate, create European Article Number 8 image in Visual Studio .NET applications.
CommandVerb SP TransactionID SP EndpointID SP MGCP 10
Bar Code Drawer In Java
Using Barcode creator for Android Control to generate, create barcode image in Android applications.
Decoding Code-39 In Visual C#
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications.
MGCP defines the nine commands in the following list For each command, the requested verb is coded as a four-letter uppercase ASCII string:
DataMatrix Recognizer In VB.NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET applications.
UPCA Drawer In Java
Using Barcode printer for Java Control to generate, create GTIN - 12 image in Java applications.
EndpointConfiguration (EPCF) Issued by a call agent to a gateway to inform the gateway about bearer/coding characteristics on the line side of one or more endpoints The only characteristic currently specified is whether the encoding on the line side is A-law or m-law CreateConnection (CRCX) Issued by a call agent to a gateway and used for the creation of a connection at an endpoint ModifyConnection (MDCX) Issued by a call agent to a gateway and used to change some of the characteristics of an existing connection One of the primary functions is to provide information to the endpoint regarding the far end of the call DeleteConnection (DLCX) Issued by a call agent to a gateway to instruct the gateway to terminate a connection (or multiple connections) The command can also be issued by a gateway to a call agent (for example, when the gateway has detected that line-side connectivity has been lost) NotificationRequest (RQNT) Issued by a call agent to a gateway to request that the gateway notify the call agent when certain events occur The gateway could be instructed, for example, to detect an offhook signal from an analog line Notify (NTFY) Issued by a gateway to a call agent to report the occurrence of certain events AuditEndpoint (AUEP) Issued by a call agent to a gateway to query the status of a given endpoint and/or other data regarding the endpoint The gateway will respond with the requested information AuditConnection (AUCX) Issued by a call agent to a gateway to query information regarding a specific connection RestartInProgress (RSIP) Issued by a gateway to a call agent to inform the call agent when one or more endpoints are taken in or out of service
EAN13 Drawer In C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create EAN-13 image in Visual Studio .NET applications.
Encode Code 39 Extended In VS .NET
Using Barcode creator for ASP.NET Control to generate, create Code 3 of 9 image in ASP.NET applications.
Downloaded from Digital Engineering Library @ McGraw-Hill (wwwdigitalengineeringlibrarycom) Copyright 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website
EAN128 Creation In None
Using Barcode encoder for Online Control to generate, create UCC.EAN - 128 image in Online applications.
Drawing Barcode In Java
Using Barcode generator for Android Control to generate, create bar code image in Android applications.
Media Gateway Control and the Softswitch Architecture
6
Command Encapsulation MGCP supports the concept of encapsulation, where one command can be included within another For example, when instructing a gateway to create a connection (a CRCX command), a call agent can simultaneously instruct the gateway to notify the call agent of certain events Thus, we can find a NotificationRequest encapsulated within a CreateConnection command This feature is particularly useful in cases when certain actions need to be taken or events need to be detected only in conjunction with other activities For example, a call agent might require an MG to detect and report DTMF tones, but only when a call is in progress In such a case, a NotificationRequest command instructing the gateway to detect and report DTMF tones would be encapsulated within a CreateConnection command, so that the tone detection would only occur in the context of the connection created MGCP enables only one level of encapsulation In other words, one command cannot be encapsulated with a second command, if that second command is already encapsulated within a third command However, MGCP does enable multiple commands to be sent at the same time within the same User Datagram Protocol (UDP) packet
MGCP Parameters Each parameter is identified by a code that comprises one or two uppercase characters A parameter code is followed by a single colon, one space character, and the parameter value In some cases, the parameter value might be a single numeric value In other cases, the parameter value might be a single hexadecimal string In still other cases, it might be a comma-separated list of values or might comprise a list of subfields The same set of parameters is available for use in commands and responses MGCP defines the following parameters, where the parameter code is indicated within parentheses:
BearerInformation (B) Specifies the line side encoding as A- or m-law For example, B:e:mu means m-law encoding CallId (C) The unique identifier for a single call, comprised of hexadecimal digits Capabilities (A) Coded in the same way as LocalConnectionOptions, this is used in response to an audit to indicate the capabilities supported by an endpoint ConnectionId (I) Unique identifier for a connection on an endpoint, comprised of hexadecimal digits
Downloaded from Digital Engineering Library @ McGraw-Hill (wwwdigitalengineeringlibrarycom) Copyright 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website
Copyright © OnBarcode.com . All rights reserved.