Call forwaring (or call diverting), in telephony, is a feature on some telephone networks that allows an incoming call to a called party, which would be otherwise unavailable, to be redirected to a mobile telephone or other telephone number where the desired called party is situated. In North America usually (though not always) the forwarded line rings once, to remind the customer using Call forwarding that the call is being redirected. More consistently, the forwarded line indicates its condition by stutter dial tone.