Protocols & Specifications:ITU X.75, HDLC, ITU G.992.3 (G.DMT.bis), ITU G.992.5, ITU G.992.1 (G.DMT) Annex B, Max Transfer Rate:24 Mbps, Digital Signaling Protocol:EURO-ISDN, ISDN 1TR6, ADSL, ISDN DSS1/ETSI, ADSL over ISDN, ADSL2+, Type:ISDN / DSL modem combo, Depth:14 cm, Height:4.5 cm, Width:21 cm, Max Operating Temperature:40 °C, Min Operating Temperature:5 °C, Humidity Range Operating:0 - 80%, Interfaces:4 x 10Base-T/100Base-TX - RJ-45 ¦ WAN : 1 x ADSL - RJ-11 ¦ WAN : 2 x ISDN - RJ-45 ¦ Management : 1 x V.24/V.28 - 8 PIN mini-DIN ¦ USB 2.0 : 1 x 4 PIN USB Type A, VoIP Protocols:SIP v2, IP Telephony Features:Echo cancellation (G.168), Voice Codecs:G.711u, G.711a, G.726, VoIP Functionality:VoIP gateway, Cables Included:Network cable ¦ Modem cable, Voltage Required:AC 230V, Power Device:External power adapter, Software Included:Drivers & Utilities