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<h2><a href="https://wiki.asterisk.org/wiki/display/AST/Calling+using+Google?focusedCommentId=22087987#comment-22087987">Calling using Google</a></h2>
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<b>comment added</b> by <a href="https://wiki.asterisk.org/wiki/display/~simon%2Btemplar">Simon Templar</a>
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<p>The caller ID tricks above are not working for incoming calls that block their caller ID. </p>
<p>If a calls comes with blocked ID, the solution above from Andrew will present the call as +@voice.go</p>
<p>The solution is to use the CUT function.</p>
<p>Below is the solution I have for my home system using Google voice, and digium phones. </p>
<p>If a call comes, I strip out the @voice.google.com , this is so I can use the function CALL BACK correctly. </p>
<p>If a call comes with blocked ID, I make the caller ID an empty string and call the function PrivacyManager(), which will ask the caller to enter their phone number.</p>
<p>On my phone, the call will then have the number they entered (which could be false), and Privacy Manager as a name.</p>
<p>You do not need to use the PrivacyManager, but it's a cool feature to play with. </p>
<p>The code below picks up the phone, strip whatever is after the @ when the caller id comes (xxxxx@voice.google.com), and sets the name to External so I know it's an external call (vs internal):</p>
<p>exten => youraccount@gmail.com,1,Answer()<br/>
same => n,Wait(1)<br/>
same => n,SendDTMF(1)<br/>
same => n,Set(CALLERID(num)=$</p>
<div class="error"><span class="error">Unknown macro: {CUT(CALLERID(name),@,1)}</span> </div>
<p>)<br/>
same => n,Set(CALLERID(name)=External)</p>
<p>The code below check if there is only 1 char in the num (which would mean it's blocked). If yes, then I remove the char to make an empty string, if not I keep it as is. Then the PrivacyManager is called. If there is a caller ID, it does not do anything. If there is none, it will catch it. Finally, I checked the caller id against my blacklist. </p>
<p>same => n,Set(CALLERID(num)=${IF($[${LEN($</p>
<div class="error"><span class="error">Unknown macro: {CALLERID(num)}</span> <p>)}=1]?:$</p></div>
<p>)})<br/>
same => n,Set(CALLERID(name)=${IF($[${LEN($</p>
<div class="error"><span class="error">Unknown macro: {CALLERID(num)}</span> </div>
<p>)}=0]?Anonymous:$</p>
<div class="error"><span class="error">Unknown macro: {CALLERID(name)}</span> </div>
<p>)})<br/>
same => n,PrivacyManager()</p>
<p>After that, you can handle the call the way you want. <br/>
IE: same => n,Dial(...)</p>
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