Versuche dies:
curl http://192.168.100.1/goform/gscan -d SADownStartingFrequency=687000000
Die Antwort sollte so aussehen:
<html lang="en"><meta http-equiv="Refresh" content="20; URL=/system.asp"><body BGCOLOR="#CCCCCC" TEXT=black><HR><h1>The device has been reset...<a href="/system.asp">RELOAD</a></h1></body></html>