H.248: Difference between revisions

Revision as of 16:23, 8 December 2010

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

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 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

Wikipedia article

@@ Line 3: / Line 3: @@
 == 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.
+[[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 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.
@@ Line 12: / Line 11: @@
-=== Planned H.248 package support ===
+=== H.248 package support ===
-Support for the following packages is currently in scope.
+[[Toolpack]] supports the following packages.
 *'''H.248.1'''
@@ Line 28: / Line 27: @@
 **Basic DTMF generation
 **DTMF detection
+**Call Progress Tones Generator
 **Basic continuity package
 **Network package
@@ Line 37: / Line 37: @@
 **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)