Compatible with Packet8 Broadband Phone Service–subscription requiredPacket8 VoIP Service includes voice mail, caller ID, call waiting, call forwarding, 3-way calling, customized area code and low international calling rates Supports up to 10 digital 5.8GHz accessory handsetsBuilt-in WAN/LAN router and firewall with easy web-based configuration for advanced featuresDirectLink™ Mode for 2-way radio communicationDual lighted keypad base and headset with speakerphone Supports an analog telephoneIncludes extra handset with caller ID, charger and belt clip