Exquisite design small size, easy to carry. the best choice of travel * More advanced version than PAP2.Unlocked version of PAP2T.Work with any VOIP service * With the Linksys PAP2T Internet telephony, along with low domestic and international phone rates, an impressive array of special telephone features are available * The Linksys Internet Phone Adapter is compatible with these and 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, and much more. * Two voice ports (RJ-11) for analog phones or Fax machines