Cisco SPA8800 IP Telephony Gateway with 4 FXS and 4 FXO Ports Type: IP Telephony Gateway Ports: 4 RJ-11 FXS phone ports for analog circuit telephone device(s) (tip/ring) 4 RJ-11 FXO line ports for telco or PABX or KTS connection(s) RJ-21 (50-pin telco connector) multiport voice connection 1 WAN 100BASE-T RJ-45 Ethernet port (IEEE 802.3) 1 AUX 100BASE-T RJ-45 Ethernet port (IEEE 802.3) for Maintenance Dimensions: 6.69 x 1.54 x 8.66 Weight: 2.85 lbs. Temperature: 0° to 45°C Humidity: 10% to 90%, Non-Condensing