On Wed, May 10, 2017 at 10:11 AM, Steve Edwards <asterisk....@sedwards.com> wrote:
> I have a 'time and attendance' application. Think janitorial or security > kind of thing where an employee goes from location to location. > > They're supposed to 'clock in' when they get to a site using a phone at > that site to prove they're there. > > Some employees have discovered 'fake caller ID' services can be used to > say they're on site when they are not. > > How can I detect a fake CallerID? The INVITE looks the same to me. > > If I have the employees call an 8xx number, can I ask my SIP provider to > include more headers to show the real ANI? What would that service be > called? > > -- > Thanks in advance, > ------------------------------------------------------------------------- > Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST > https://www.linkedin.com/in/steve-edwards-4244281 > > For dangerous material sites a call back was used. They call in and get a code, the system calls back and asks for the code. Convoluted yes, the call back was all that was really needed to thwart the fraud. A simple RFID pad setup could be built to use low usage GSM plan to tag in the RFID on site. But this is beyond the scope of telephony. -- - Andrew "lathama" Latham -
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