Dear List: I need to make a sip phone (spa942) answer a call but the phone must no ring. The user only has to show the callerId on the phone screen without any sound. How could I make that in asterisk? I tried to use Sip headers but I do not know how must I say the phone don't ring when received, only shows the callerID of the call. How could I do that with sip header? Which sip header should I send the phone to change the callerID of the call? Do you know any other way to ghet that. Any clue will be wellcomed. Thanks for your answer. VoipCrazy.