H.248

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(Added note that H.248 is not supported on Solaris)
(TelcoBridges and H.248)
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== TelcoBridges and H.248 ==
 
== TelcoBridges and H.248 ==
A version of [[Toolpack]] that supports the H.248 protocol is currently in development and is targeted for release in the first half of 2010. Further details will be provided at that time.
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[[Toolpack]] now supports the H.248 protocol.
  
 
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As indicated in the diagram below, the H.248 stack is a module in the media gateway application residing on the application server. It communicates with the various Toolpack classes (CAFClass, [[CMC library|CMC Library]], CMC Class) as required via a new [[CAF:_Working_With_Call_Legs|Media Leg API]]. In turn, the media gateway application communicates with the softswitch / media gateway controller via the H.248 protocol.
As indicated in the diagram below, the H.248 stack will be implemented as a module in the media gateway application residing on the application server. It will communicate with the various Toolpack classes (CAFClass, [[CMC library|CMC Library]], CMC Class) as required via a new [[CAF:_Working_With_Call_Legs|Media Leg API]]. In turn, the media gateway application will communicate with the softswitch / media gateway controller via the H.248 protocol.
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=== Planned H.248 package support ===
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=== H.248 package support ===
Support for the following packages is currently in scope.
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[[Toolpack]] supports the following packages.
  
 
*'''H.248.1'''
 
*'''H.248.1'''
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**Basic DTMF generation
 
**Basic DTMF generation
 
**DTMF detection
 
**DTMF detection
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**Call Progress Tones Generator
 
**Basic continuity package
 
**Basic continuity package
 
**Network package
 
**Network package
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**Fax/TextPhone/Modem tones detection (fax and data only)
 
**Fax/TextPhone/Modem tones detection (fax and data only)
 
**Call type discrimination package (fax and data only)
 
**Call type discrimination package (fax and data only)
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**IP Fax (Event: Fax Connection Change - end of fax session, call terminating)
  
  

Revision as of 15:23, 8 December 2010

Also known as Megaco, H.248 is a protocol for controlling media gateways via a softswitch or a media gateway controller.


Contents

TelcoBridges and H.248

Toolpack now supports the H.248 protocol.

As indicated in the diagram below, the H.248 stack is a module in the media gateway application residing on the application server. It communicates with the various Toolpack classes (CAFClass, CMC Library, CMC Class) as required via a new Media Leg API. In turn, the media gateway application communicates with the softswitch / media gateway controller via the H.248 protocol.


H.248 schematic.jpg


H.248 package support

Toolpack supports the following packages.

  • H.248.1
    • Protocol v2
    • IPSec connection support
    • Support UDP (2944 or user-defined)


  • H.248.1 - Basic packages
    • Generic
    • Base Root
    • Tone generator (for extension purposes only)
    • Tone detection (for extension purposes only)
    • Basic DTMF generation
    • DTMF detection
    • Call Progress Tones Generator
    • Basic continuity package
    • Network package
    • RTP package
    • TDM Circuit package


  • H.248.2 Facsimile, text conversation and call discrimination packages
    • Fax/TextPhone/Modem tones detection (fax and data only)
    • Call type discrimination package (fax and data only)
    • IP Fax (Event: Fax Connection Change - end of fax session, call terminating)


  • H.248.4 Transport over Stream Control Transmission Protocol (SCTP)


  • H.248.7 Generic announcement package
    • Generic announcement package


  • H.248.10 Media gateway resource congestion handling package
    • Congestion handling package


  • H.248.11 Media gateway overload control package
    • Overload control package


  • H.248.13 Quality alert ceasing package
    • Quality alert ceasing package


  • H.248.14 Inactivity timer package
    • Inactivity timer package

Additional details

  • Support for text mode only
  • Not supported on Solaris builds

References

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