<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, May 10, 2017 at 10:11 AM, Steve Edwards <span dir="ltr"><<a href="mailto:asterisk.org@sedwards.com" target="_blank">asterisk.org@sedwards.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I have a 'time and attendance' application. Think janitorial or security kind of thing where an employee goes from location to location.<br>
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They're supposed to 'clock in' when they get to a site using a phone at that site to prove they're there.<br>
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Some employees have discovered 'fake caller ID' services can be used to say they're on site when they are not.<br>
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How can I detect a fake CallerID? The INVITE looks the same to me.<br>
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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?<span class="HOEnZb"><font color="#888888"><br>
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Thanks in advance,<br>
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Steve Edwards <a href="mailto:sedwards@sedwards.com" target="_blank">sedwards@sedwards.com</a> Voice: <a href="tel:%2B1-760-468-3867" value="+17604683867" target="_blank">+1-760-468-3867</a> PST<br>
<a href="https://www.linkedin.com/in/steve-edwards-4244281" rel="noreferrer" target="_blank">https://www.linkedin.com/in/st<wbr>eve-edwards-4244281</a><br>
<br></font></span></blockquote></div><div><br></div><div>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.</div><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">- Andrew "lathama" Latham -</div></div>
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