Hello,
i'm working on a project where I need to manage a call waiting queue, in early media mode, to have a free waiting time, and start billing only after the call is really answered.
The general call flow is :
1- incoming call to a service number
2- early media answer (pre-answer) to manage voice messages
3- the call is put in a waiting queue, and the caller ears a message (MOH), still in early media
4- the queue is associated to a unique destination number, and then one an only call at a time is picked-up from the queue and bridged to the destination.
5- When the call is established (200 OK), the incoming call is also answered (200 OK), which starts the billing.
Question : this looks like a basic call queue handling, and mod_fifo could be a perfect fit for that ... except that mod_fifo answers the call with a 200 OK
Is it possible to manage early media with mod_fifo ?
Does someone have a best practice, experience, or advice to share on this matter ?
Thanks with anticipation
D. Jeannerod