The Grandstream HandyTone 486 is a next generation, cost effective solution for consumers looking to transition their traditional analog telephone devices to the savings and benefits of an IP telephony network. The HT486 offers 1 FXS port to connect existing analog telephone or a fax machine and 1 PSTN pass-through port, for toggling operations between SIP and PSTN networks. An integrated router, NAT, DHCP server, 1 port FXS telephone gateway offers the highest-level of voice-over-IP integration.