The Cisco PAP2T Internet Phone Adapter with 2 Vo IP Ports enables high-quality feature-rich Vo IP service through your broadband Internet connection. Just plug it into your home router or gateway & use the two standard telephone ports to connect analog phones or fax machines. Each phone port operates independently, with separate phone service & phone numbers, like having two telephone lines. Youll get clear reception & reliable fax connections, even while using the Internet. With Internet telephony, along with low domestic & international phone rates, an impressive array of special telephone features are available. Choose your preferred free local dialing area code, regardless of where you live. Or add a virtual telephone number in any area code, forwarded to your Internet phone. You can even add a toll-free number. The Linksys Internet Phone Adapter is compatible with these & all of the other special telephone features that are available from your Internet telephony service provider, such as Caller ID, Call Waiting, Voicemail, Call Forwarding, Distinctive Ring, & much more.