Trunking Media Gateway transmits media stream between IP network and circuit switching network, implements the interworking of IP and circuit switching network together with signaling gateway in softswitch network.

Trunking Media Gateway transmits media stream between IP and circuit switching networks, implements interworking of IP and circuit switching networks with signaling gateway in Softswitch network.

The Eapansion of Signalling Module for Trunk Gateway;

Then the paper gives an solution of this problem and draws out the main object which the paper elaborates,the trunk gateway.

Key Technologies for Implementation of QoS-guaranteed Media Gateways in NGN;

Research and Implementation of Real-time IP Facsimile on SIP-based Media Gateway;

Key Technical Solution Research and Development for the NGN Trunking Media Gateway;

The curr ent related protocols are MGCP and Megaco.

This paper focuses on the "SP30MAX--MG" project, part of thenext--generat ion Tele--communicat ion network solut ion----SP30MAX of DaTangTe1ephone Corp.

By signaling,it implements the control of MGC on MG,and MG can also send necessary signaling information to MGC,thus setting up a call flow.

By using Freescale’s 32 bit embedded processor and CSR’s Bluecore5, this paper developed a multimedia gateway, realizied hands free, phonebook download and stereo music streaming.