[Asterisk-Users] Working with an ongoing call

[Darren Wiebe]

If you visit voipjets site, they say a little about how they work with 
issues like that.  I plan to integrate something similar to what they 
have into ASTPP but it has not happened yet.

Darren Wiebe
darren at aleph-com.net

Waldo Rubinstein wrote:

> Eivind,
>
> I was thinking of doing something similar and came across a slight  
> variation of your problem.
>
> While testing a home-grown prepaid solution, a beta-"friend" informed  
> me that he detected a problem I could run into, which I will attempt  
> to describe below.
>
> Say he makes a call and is informed he has 30 minutes left on the  
> call. After, say, 9 minutes, he hook flashes in order to get the  
> second line (just like call-waiting/three-way-calling feature). At  
> this point he can me a second call where he MAY be informed  
> accurately that now he has 21 minutes left. The problem is that the  
> first call has not hung up so he is not necessarily informed of the  
> accurate time left for the second call. Additionally, say he speaks  
> for another 10-15 minutes (regardless of whether or not he hook- 
> flashes again to do three-way calling) and then returns to the first  
> call. At that point he can continue on the first call for the  
> original full 30 minutes, even though he consumed (potentially) 40-45  
> minutes.
>
> Has anyone worked some solution for this (as well as Eivind's  
> problem) in all the prepaid solutions out there I see constantly on  
> the list?
>
> Thanks,
> Waldo
>
> On Jul 20, 2005, at 4:49 AM, Eivind Trondsen wrote:
>
>> Hi list
>>
>> I plan to implement a prepaid solution where the system needs to  
>> check for
>> remaining credit periodically during a call. The reason for this is  
>> that this
>> is a system where the credit pool can be used simultaneously by  more 
>> people,
>> and not only for calling.
>>
>> I have a problem figuring how to be able to run logic while a call  
>> is in
>> progress. The L(x:y:z) option to Dial() is good, but not quite what  
>> I need.
>> In both the dialplan an an AGI the Dial command blocks, so what do  I 
>> do?
>>
>> I have not yet tried a multi-threaded AGI, but assume the  
>> possibility of
>> success with that scenario to be slim...
>>
>> Ideally; I want to code things like this:
>>
>> Fetch cost of requested call;
>> # The reserve functions also supplies total remaining credit
>> unless (Reserve credit for N seconds) exit with message;
>> INITIATE CALL;
>> If answered {
>>   while(1) {
>>     Wait for N-x seconds;
>>     Reserve credit for N seconds;
>>     if (close to credit limit) PLAY WARNING BEEP;
>>     else if (out of credit) EXIT WITH MESSAGE;
>>   }
>> }
>>
>> hangup_trap:
>>  Commit credit based on actual call length;
>>
>> EOF
>>
>> I realize that this probably needs to be done as a combination of  
>> dialplan
>> logic and AGIs, but my main concern is the ability to
>>
>> 1) send sound to the caller of an ongoing call
>> 2) retain control so the call can be terminated based on a timer  (or 
>> whatever)
>>
>> Any tips would be greatly appreciated! Thanks in advance.
>>
>> -- 
>> Eivind Trondsen
>>
>> "People are destined to be party animals,
>> and the technology will follow"
>>                          - Linus Torvalds
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