This project is for the development of a Virtual PBX system (both front- and back-end). You can view all the needed features here: [url removed, login to view]
I need the same features, including the various billing plans and options of local/toll-free numbers. Or they can connect their existing phone number with our system. The client can then configure extensions from the website, and where the extensions will ring.
You will also need to advise what equipment is needed for this. For project completion, the website will need to be fully functional.
Asterisk or Elastix should ideally be used, so you should be comfortable working with this.
Note: PBX features with isolated multi tenancy is required.
All tenants should be completely isolated from each other
for example company-A with extenion 101 can not call Company-B with extenion 101.
Please keep in mind that this is a Multitenat PBX solution.