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CID set by user device - for pbx trunks

Configuration example for Asterisk 1.6 pbx to send CID using sip trunk.

Enable Caller ID 'Set by user device' from your account page.

In your asterisk sip.conf file set something like this:

callerid = Anonymous

register =>

;here we place the sip settings for

;here is our example extension that wants to send a CID

insecure = no
canreinvite = no
regexten = 8000
dtmf = rfc2833
context = sip-phone
host = dynamic
type = friend
username = 8000
secret = 1234
nat = yes

In extensions.conf the CID would be set like this (we are setting 353539431111):

exten => _X.,1,Answer
exten => _X.,2,Set(CALLERID(name)=353539431111)
exten => _X.,3,Set(CALLERID(num)=353539431111)
exten => _X.,4,Dial(SIP/${EXTEN}@mydivert,60,r)
exten => _X.,5,Hangup

If you are using FreePBX here are some tips:

add sendrpid=yes to the trunk's PEER Details on the FreePBX GUI

The CallerID Number format is very strict. It must follow the format "abcdefg"<123456789>. The important bits are:
(a) you must have the string section even if it is an empty string.
(b) you must have the angle brackets
(c) the number itself must contain numberals only and can contain any number of digits, but must not start with a single 0.
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