Sparklan ata-002s 2-port analog telephone adapter Toll-free within the same sip network Sparklan 2-port analog telephone adapter is based on industry standard, sip protocol. It can convert any traditional analog telephone into ip phone. You plug your analog telephone into the fxs port of ta while the 2-port wired ta is connected to router, adsl modem, or hub. Second, you will apply sip phone number from your operator, and then you can make international phone calls with friends or business partners with telephone features, such as call transfer (attended), call forward (busy/no answer/unconditional), call hold/retrieve, waiting, caller id display, anonymous. Product highlight Voip protocol: Sip 2-port fxs,1port rj45 lan,1port wan Support qos: Tos (type of service) configuration for audio and signaling ethernet packets Supported protocol: Dhcp, dns, nat, Web-based management Call features: Call transfer (attended), call forward (busy/no answer/unconditional), call hold retrieve, waiting, caller id display, anonymous call, anonymous call blocking How to use Step 1: Connect to traditional analog phone Step 2: Connect to router, adsl modem, or hub Step 3: Apply sip phone number and sip setting Step 4: Make cost-effective phone calls