D-Link VOIP DVX-7090 - Manual (Page 7)

Product overview
2.2 S OFTWARE
The DVX-7090 software has a modular structure that includes five functional components:
ƒ Control Unit (CU),
ƒ Switching Unit (SU),
ƒ Database server (DBS) and
ƒ Web-interface (WI).
Fig. 2 presents a block diagram of the D-Link VoIP Router software
Fig. 2 Block diagram of D-Link VoIP Router software modules
The CU is the Router’s backbone element that functions as a server intended for user
authentication and authorization, control of the SU, and interaction with the database server
(DBS).
The SU is an integration of:
ƒ a stateful softswitch that transparently supports the SIP and H.323 signaling protocol
ƒ an RTP/RTCP proxy for conversion and reassembly of IP packets without
modification of their contents (i.e. without codec conversion)
ƒ a media proxy for full conversion of media streams
ƒ an audio file recording and playback utility (.wav format)
ƒ a SIP registrar
ƒ a SIP client for registering to remote SIP registrars/proxy servers
ƒ an H.323 gatekeeper
ƒ a RAS client for registering to H.323 gatekeepers/proxy servers
DVX-7090 VoIP Router page 7 of 83