Asterisk 15 + AGI = unable to catch CALLERID(num)

[IgorZem]

Hello people,

I have a telephone line with n operators. In case of incoming call all n operators have their phonesets ringing. When a certain operator picks up the phone, I need AGI to catch his/her internal number + calling party’s number and send both params to some external system over http with curl.

The problem is that I cannot do this:

exten => 6,n,Dial(SIP/2001&SIP/2002&SIP/2003,20)
exten => 6,n,AGI(/var/lib/asterisk/agi-bin/script.sh)

Because AGI() will be called after the operator’s hang up.

And I cannot do like this:

exten => 6,n,AGI(/var/lib/asterisk/agi-bin/script.sh)
exten => 6,n,Dial(SIP/2001&SIP/2002&SIP/2003,20)

Because we don’t know operator’s number yet.

One of the solution that I found is to call Dial() with U() sub-function like this:

[main-context]
...
exten => 6,n,Dial(SIP/2001&SIP/2002&SIP/2003,20,U(agi-context))

[agi-context]
exten => s,1,AGI(/var/lib/asterisk/agi-bin/script.sh)
exten => s,n,Return()

Using U() I am unable to catch CALLERID(num) within [agi-context]. Setting variables in the [main-context] also does not work. I know that setting a variable with SET() in one context should be visible/accessible in another, but in fact U() breaks this logic. The only way is to set the GLOBAL variable in [main-context] and catch it in [agi-context]. But I think this is absolutely incorrect in case of having several parallel calls.

Could you advise me another way to accomplish this task?

Thank you in advance.

[david551]

U is run on a different channel. You should be able to set a variable, but you will need to prefix it with _ on the Set.

[IgorZem]

Hello! I really appreciate your advice. Thanks, it helped.
Best regards!

[penguinpbx]

Welcome @IgorZem! If you are satisfied, then marking the post by @david551 as the solution might be helpful for the next user who has a similar question. You may also find further information on Variable Inheritance in the Asterisk documentation.