SIP proxy, SIP registrar, SIP<->H323 converter, H323 switch, gatekeeper, SQL based billing, callback module, IP IVR, SIP tunnel server (vpn). SIP Softphone with g723.1 voicecoder NAT support - both inbound and outbound calls , DIDs mapping, pc 2 pc, device 2 pc,Mobile 2 Mobile or Phone via Internet. |