Hello Im Sourish, I'm an asterisk, vicidial and linux expert. I have installed more than 50 freepbx servers in last 2 years. I am even an active vicidial & freepbx community member. I have already done similar project with chan_dongle module installation and configuration on freepbx running in raspberry pi. I hope you will be satisfied with my work and i have enough experience to complete the project. You can pay me once you are happy with the installation and I can provide you long term support too. Please do let me know if i can be a part of this project and i would eagerly wait for your response.
Thanks
Sourish