Media Gateway Control Protocol

MEGACO is a general-purpose gateway-control protocol, standardized in the IETF as RFC 3015 and as recommendation H.248 in the ITU-T. It is a master-slave, transaction-oriented protocol in which Media Gateway Controllers (MGCs) control the operation of Media Gateways (MGs). Our MEGACO stack and other Voice over Packet (VoP) software frameworks provide a complete set of building blocks to rapidly develop feature-rich applications that meet carrier-class requirements of redundancy, scalability and reliability. MEGACO/H.248 is central to VoIP solutions and may be integrated into products such as central office switches, gateways (trunking, residential and access), network access servers, cable modems, PBXs, IP phones, soft phones, IADs, and other products that support convergent voice and data services.

Key Features

We were one of the first vendors with a deployable MEGACO/H.248 stack, and continually update releases of this software to meet all of the functional and performance requirements for the latest convergence products. Key features include:

  • Based on IETF MEGACO WG - RFC 3015 + IG (June 2001)
  • ITU-T H.248
  • Both Media Gateway (MG) and Media Gateway Controller (MGC) support
  • Multiple application registration support
  • TCP ,UDP and ATM (as per Annex I) Transport support
  • ABNF and ASN.1 encoding/decoding (including Annex C) support
  • Well-defined APIs
  • Modular packaging
    • Independent MG and MGC modules
    • Independent layers available - MEGACO Service User Interface and Core stack
  • Extensive package support. Easy data-driven addition and updating of package support
  • More than 100 packages supported, including the ones for Q.1950 and 3G in Rel. 3.0
  • MIB support as per draft-ietf_megaco_mib_02.txt
  • ATM SDP support, as per RFC 3108
  • Descriptor isolation: descriptors unlikely to be part of a profile can be compiled out
  • ALF support
  • Init-time dimensioning of the stack for easy scalability
  • Highly flexible service user interface
  • Support for multiple redundancy configurations
  • Rich operations and management support