The EMTA in NGN

• SIP phone: a multimedia device working in the Session Initiation Protocol (SIP).
• SessionEngine (SE): an IP gateway developed by Huawei. It is often used at the portal of residential network and enterprise network, or at the convergence layer of a metropolitan area network (MAN). The SE functions as a firewall or a service gateway. When functioning as a service gateway, the SE provides private network traversal and Quality of Service (QoS).
• Signaling gateway (SG): a gateway that connects the Signaling System No.7 (SS7) network to the IP signaling network. It converts the signaling between the PSTN (SS7) and the IP network (packet signaling).
• Trunk media gateway (TMG): a gateway that resides between the circuit switched (CS) network and the IP network. It converts formats between the pulse code modulation (PCM) signal flow and the IP media flow.
• Universal media gateway (UMG): a gateway that converts media stream formats and signaling formats. It can be used as a TMG, an embedded SG, or a UA. The UMG can connect devices such as:

  • PSTN exchange
  • Private branch exchange (PBX)
  • Access network devices
  • Network access server (NAS)
  • Base station controller (BSC)

Do you have detail about Session Initiation Protocol (SIP) stack???

the post is well enough

hi, 

i want to know also about 

• PSTN exchange

MSOFTX3000 Product Documentation : User Manuals>Knowledge Guide>Protocols>SIP Protocol