The problemI faced a problem a lot when implementing Lync/SFB as IP PBX, it is IVR and attendant systems.
I heard requests from customer like:
- Why I need MS exchange if I'll only install Lync/SFB.
- I need to change the language of all prompts not only greeting and so on.
- I need more options and flexibility in the IVR option (example, inform caller of transferring the call while calling the internal extension)
- I have google cloud and need to have missed calls and voice mails to be sent to users email
We was about to loss or lost a lot of hot opportunities cause of things like this.
so what is the solution ??!!.
It is 3rd party IVR and voicemail system which I developed by myself using Asterisk PBX and Postfix on a Linux machine.
- As blow image I insert the IVR system in middle of incoming calls between Voice gateway and Lync/SFB system while leaving the outbound call path as it is.
- All incoming calls pass through IVR first then it answer the call and run the prompts as needed workflow, and waiting to get the caller digits.
- Then the IVR system transfer the call of Lync/SFB with monitoring the status of the call if didn't answered the IVR contact the mail server and send voicemail and/or missed call notification mail to the called person.
- I already have basic IVR workflow as below image which I will represent it in this blog
Installation of IVR
First I won't go though Linux installation also you could choose any distribuation of Linux but to use the same commands for asterisk installation, use Centos 6.x.
for Asterisk installation do below:
- Update Centos
- Disable firewall
- Install prerequisites
- Download Asterisk Source
- Extract and Install Asterisk
for 64 bit:
- Start asterisk