Uniden UIP1869V Expandable Vonage Internet Phone System Built-in router and firewall; supports connection of optional analog telephone Requires broadband and Vonage VoIP service; brings Vonage service to your whole house Expandable to 10 handsets, 1 included; corded handset on base 5.8 GHz digital spread spectrum technology; base speakerphone 100-number shared caller ID/phonebook memory per handset