[asterisk-users] Roaming callback?

[SIP]

Jaap Winius wrote:
> Quoting Jerry Harshany <ger at JerryH.us>:
>
>   
>> There is an additional alternative for a ringback to a caller, which  
>>  is to use the Call File capability as noted in Van Meggelen's   
>> "Future of Telephone"; 2nd ed, p306.
>>     
>
> As it says in the book, call files allow calls to be created through  
> the Linux shell. If you've used this to create a roaming callback  
> service, then you must have created something that allows users to  
> submit a phone number to be called back on, after which a .call file  
> is created and moved to the /var/spool/asterisk/outgoing/ directory.
>
>   
>> sleep 8s
>> mv "$1"  "$2"
>> exit 0
>>     
>
> This looks like the step that moves the newly created call file to the  
> aforementioned directory.
>
>   
>> In my case, when the caller calls in to 'asterisk', he is prompted   
>> for the number he wishes to call. The caller can be at a US or   
>> international number, and he can call any US or international   
>> number, WITH or WITHOUT ringback. In other words the caller   
>> designates whether this is a direct connect call, or a ringback (and  
>>  then bridge the called number). I have the complete flexibility of   
>> my dial plan extensions to do as I wish with the phone numbers.
>>     
>
> This is what I'm really interested in! How did you manage this? Would  
> you be willing to share how you did this?
>
>   

I would imagine if it's a callback, it creates a callfile. If it's not, 
it just connects the call as it would normally. We have a similar thing 
for our business customers built using a reasonably simple agi script to 
do verification of the caller/account and creation of the call files. A 
rather simple Dial command can handle the direct connection after 
verification, and a rather simple call file can handle the callback. The 
hardest part was getting the DTMF reading to work well. ;)

N.