Grandstream GS-HT701 Handytone 701 ATA Analog Telephone Adapter Single FXS telephone port(supporting 5 REN) single 10/100M Ethernet port LEDs for Power, Internet, LINK/ACT, and Phone status Strong security protection of voice/data privacy using TLS/SRTP/HTTPS, secure and automated provisioning using TR069 and HTTP/HTTPS/TFTP Advanced Telephony features including caller ID, call waiting, 3-way conference, transfer, forward, do not disturb, message waiting indication, multi-language voice prompt, T.38 Fax, flexible dial plan Support comprehensive voice codecs including G.711 with Annex I/II, G.723.1, G.729A/B, G.726, iLBC