> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/sip-and-voip/h248-mgcp.md).
# H.248 and MGCP
H.248, also known as Megaco: the protocol a softswitch or media gateway controller uses to control media gateways. Applies to Tmedia 3.2 and 3.3.
Also known as Megaco, H.248 is a protocol for controlling media gateways via a [softswitch](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/features-and-solutions/solutions/softswitch)/[Media Gateway Controller (MGC)](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/features-and-solutions/solutions/softswitch).
> **Applies to:** Tmedia 3.2,3.3
### TelcoBridges and H.248
TelcoBridges [Tmedia](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/tmedia) devices support the H.248 protocol.
TelcoBridges [Tmedia](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/tmedia) devices can be controlled using the [H.248](/telecom-references/sip-and-voip/h248-mgcp.md) protocol from Media Gateway Controllers (MGC), including, but not limited to, Metaswitch CFS and AMGC, Ribbon C20, Nokia MGC10 and Teles MGC. In this model, the [Tmedia](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/tmedia) is a Media Gateway (MG). This solution has been deployed in numerous locations with all of these MGC models.
Call routing functions and subscribers are configured in the MGC. The Media Gateway (MG) has the TDM port configuration for legacy networks and the RTP ports configuration to handle the media. It supports tone detection, tone generation, announcements, fax, modem, and more.
The H.248 configuration can be paired with Sigtran functions (M2UA, M3UA, IUA, V5UA) to support signaling relay to the MGC.
#### H.248 package support
TelcoBridges [Tmedia](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/tmedia) devices support 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 Signaling 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)
* **H.248.36 Hanging Termination Detection package**
* Hanging Termination Detection package
* **Q.1950 packages**
* Basic call progress tones generator package
* Expanded call progress tones generator package
* Basic services tones generator package
* **Metaswitch Proprietary Packages**
* See [Metaswitch Softswitch Integration](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/features-and-solutions/solutions/metaswitch-cfs-softswitch-integration)
### Additional details
* Support for text mode only
### Configuration
* [Web Portal v3.2: H.248 Configuration](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/web-portal-previous/web-portal-3-2/protocol-stack/protocol-stack-settings#h248-megaco)
* [Web Portal v3.0: H.248 Configuration](https://prosbcdocs.telcobridges.com/tmedia-documentation/other-pages/protocol-stacks-general/tmedia-tdev-and-tsig-web-portal-3-0-protocol-stacks#h248-megaco)
Click here for other versions
* [Web Portal v2.10: H.248 Configuration](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/web-portal-previous/web-portal-2-10/tmedia-tdev-and-tsig-web-portal-2-10-protocol-stacks#h.248-megaco)
* [Web Portal v2.9: H.248 Configuration](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/web-portal-previous/web-portal-2-9/web-portal-2-9-protocol-stacks#h.248-megaco)
* Web Portal v2.8 and earlier (including H.248 on TMG devices, v2.6 and before): documentation is no longer published. Contact [technical support](https://prosbcdocs.telcobridges.com/tmedia-documentation/operations-and-support/support/contacting-telcobridges-technical-support) if you need it.
### References
* [Wikipedia article](http://en.wikipedia.org/wiki/Megaco)
## In this section
* [MGCP](/telecom-references/sip-and-voip/h248-mgcp/mgcp.md)
* [TB Media Gateway](/telecom-references/sip-and-voip/h248-mgcp/tb-media-gateway.md)
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