On Sat, Dec 02, 2006 at 05:15:02PM -0500, John Ioannidis wrote: > On Sat, Dec 02, 2006 at 10:21:57AM -0500, Perry E. Metzger wrote: > > > > Quoting: > > > > The FBI appears to have begun using a novel form of electronic > > surveillance in criminal investigations: remotely activating a > > mobile phone's microphone and using it to eavesdrop on nearby > > conversations. > > Not very novel; ISDN phones, all sorts of digital-PBX phones, and now > VoIP phones, have this "feature" (in the sense that, since there is no > physical on-hook switch (except for the phones in Sandia and other > such places), it's the PBX that controls whether the mike goes on or > not).
It's been a while since I built ISDN equipment but I do not think this is correct: can you show me how, exactly, one uses Q.931 to instruct the other endpoint to go off-hook? --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]
