H.248
Also known as Megaco, H.248 is a protocol for controlling media gateways via a softswitch/Media Gateway Controller (MGC).
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 (Ringing, Busy, Congestion and Warning tones supported)
- Basic continuity package
- Network package
- RTP package
- TDM Circuit package (only echo-cancellation)
- 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)
- Partial support
- H.248.7 Generic announcement package
- Generic announcement package (Fix Announcement play only)
- 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
- H.248.16 Enhanced digit collection packages and procedures
- Extended DTMF detection package
- Enhanced DTMF detection package
- H.248.23 Enhanced alerting packages
- Enhanced alerting package
- Analogue Display Signalling package
- H.248.25 Basic CAS packages
- Basic CAS package
- Basic CAS addressing
- H.248.27 Supplemental tones packages
- Carrier tones generation package
- Diagnostic tones generation package
- H.248.28 International CAS packages
- International CAS
- CAS blocking
- H.248.29 International CAS compelled register signaling packages
- Annex A.1 only in 'enbloc' compelled mode (International CAS Compelled package - No digitmap control: Digitmaps are preconfigured on MG)
- Q.1950 packages
- Basic call progress tones generator package
- Expanded call progress tones generator package
- Basic services tones generator package
Additional details
- Support for text mode only
Configuration
- Web Portal v3.0: H.248 Configuration
- Web Portal v2.10: H.248 Configuration
- Web Portal v2.9: H.248 Configuration
- Web Portal v2.8: H.248 Configuration