Hello,
I have experience with Asterisk more than 7 years. Supporting and developing for Asterisk is my profession and main job.
So I had a lot of projects with Asterisk and project based on it such as FreePBX, Elastix, Trixbox, etc.
I'm new here on freelancer.com, but I work a lot with other sites such as Elance. So if you need recommendations or my previous feedback, I have it.
Feel free to ask any questions here or in Skype. My Skype is kir.mulai.
Hope for cooperation.