Osea según el modelo y el fabricante del terminal. Si telefónica envía esto: INVITE sip:91xxxxxxx@192.168.1.140:5060 SIP/2.0 Via: SIP/2.0/UDP 10.31.255.134:5070;branch=z9hG4bKrsbdcl1018j99bf6rtl0.1 To: "34 91xxxxxxx"<sip:91xxxxxxx@telefonica.net> From: <sip:000000000@telefonica.net>;tag=1067692274-1524567518681- Call-ID: BW125838681240418-1141023041@192.168.126.12 CSeq: 1000806125 INVITE Max-Forwards: 68 Content-Length: 149 Contact: <sip:000000000@10.31.255.134:5070;endpoint=192.168.126.12;transport=udp> Content-Type: application/sdp Allow: ACK, BYE, CANCEL, INFO, INVITE, OPTIONS, PRACK, REFER, NOTIFY, UPDATE Accept: application/media_control+xml Accept: application/sdp Accept: multipart/mixed Supported: timer Min-SE: 180 Session-Expires: 600 P-Called-Party-ID: <sip:91xxxxxxx@telefonica.net> Recv-Info: x-broadworks-client-session-info Que quieres que ponga el terminal en el display. O te refieres a que no sale este 000000000 en los terminales sin pantalla.
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