• 【Internet Phone Adapter】Through the VOIP gateway, you can easily realize long-distance calls or free global calls, broadband networks, routers, and ordinary phones. (Broadband network + router + gateway + ordinary phone = save domestic or international long-distance calls or free global calls.)
• 【Multiple Ports】This is a telephone adapter with 1 10/100 M RJ-45 network interface, 2 standard telephone interfaces, 1 power interface, and 2 IP voice ports
• 【Network Protocol】VOIP gateway supports SIP V2 protocol. Easily complete configuration access encryption through a web browser to automate firmware upgrades
• 【Multimedia Format】Internet phone adapter supports fax and multi-voice compression G.711, G.726, G.729, G.723.1

Internal ref - B29