16 telephone FXS ports with both RJ11 and 50-pin Telco connectors, as well as per port LED Gigabit Ethernet and a backlit 128×32 graphic LCD display with support for multiple languages 2 SIP server profiles per system and independent SIP account per port Supported voice/fax codecs include G.711, G.723.1, G.726, G.729A/B, iLBC, T.38 Fax