Communication Division

The VoIP (Voice of IP) and wireless network gateway architected for all IP-based 3G mobile networks and the IMS core of fixed-mobile networks, is a key element of the 3G CS core network and the IMS (IP Multimedia Subsystem) networks . Designed to serve as a gateway connecting two networks (i.e., PSTN and IMS, PSTN and 3G CS core, 3G RAN and 3G CS core, 3G CS and IMS, IMS and VoIP, etc.), the IMG-24K supports MEGACO (3GPP Mn, Mc) protocol for interconnecting the MGC (Media Gateway Controller) of an IMS network and the MSC server of the 3G CS core network.

Application

• IMS media gateway
  • - Voice bearer over Mb (AMR/RFC3267)
  • - MGC interworking over Mn interface (MEGACO)
  • - IMS-PSTN, IMS-3G mobile core, and IMS-VoIP networks interconnection
• 3G Iu/CS media gateway
  • - ATM or IP based radio network (RAN: Radio Access Network) interconnection
  • - 2G BSC interconnection over A-interface (TDM)
  • - MSC server interworking over Mc interface (MEGACO)
  • - 3G-PSTN and 3G-IMS network interconnection

Features

• Extensive media interface
  • - Interface between IMS and PSTN network
  • - Interface between IMS and 3G CS core network
  • - Interface between IMS and other VoIP network
• Open Standard Interfaces
  • - 3G CS : Iu-CS (ATM/IP), Nb (ATM/IP), Mc
  • - IMS : Mb(RFC3267), Mn, 3G-324M
  • - ATM(AAL1, AAL2, AAL5), TDM (E1/T1, STM-0, STM-1), IPv4, IPv6
  • - ATM to ATM TrFO, ATM to IP TrFO, IP to IP TrFO
• Extensive call scenarios
  • - Iu-MGW : Iu(ATM/IP)-Nb(ATM/IP), Iu(ATM/IP)-IMS, Iu(ATM/IP)-PSTN
  • - CS-MGW : Nb-Iu(ATM/IP), Nb(ATM/IP)-IMS, Nb(ATM/IP)-PSTN
  • - IMS-MGW : IMS-PSTN, IMS-Iu/Nb(ATM-IP), IMS-VoIP
• Modular scalability (Up to 24K TrFO channel capacity)
• Complete redundancy to ensure the highest reliability
• Active/Standby duplication or N+1 redundancy
• Extensive voice codecs (fixed/wireless voice codec, H.263, MPEG-4, H.264 video codec)
• SNMP protocol for NMS connection
• EMS/GUI for convenient centralized operation
• Signaling protocol source developed in-house allowing for fast, low-cost customization
• Offers Enhanced Media
  • - Conference, Recoding & Announcement, Tone Functions