The Linksys SPA1001 is "UNLOCKED", and may be configured for use with most SIP based VoIP Services that allow BYOD (Bring Your Own Device).

Inexpensive, easy to install and simple-to-use, the Linksys SPA1001 connects a standard telephone or fax machine to IP-based data networks. IP telephony service providers and enterprise users can offer residential and business users traditional and enhanced communication services via the customer's broadband connection to the Internet or Local Area Network (LAN).

Linksys SPA1001 Single FXS SIP Gateway. Single RJ11, Single RJ45

Linksys SPA1001 Features:

    * Terminating Impedance Agnostic - 8 Settings
    * Call Waiting, Cancel Call Waiting
    * Caller ID with Name / Number
    * Caller ID Blocking
    * Call Waiting Caller ID with Name / Number
    * Call Forwarding: No Answer / Busy / All
    * Do Not Disturb
    * Call Transfer
    * Message Waiting Indication - Visual and Tone Based
    * Call Return
    * Call Back on Busy
    * Call Blocking with Toll Restriction
    * Delayed Disconnect
    * Distinctive Ringing
    * Off-Hook Warning Tone
    * Selective / Anonymous Call Rejection
    * Hot Line and Warm Line Calling
    * Speed Dialing of 8 Numbers / Addresses