Hello we are a new VOIP/SIP Provider and need to customize the Asterisk A2billing and also be able to add a few modules such as multiple DID Forwarding (Check Box next to DID to be forwarded. ) screenshots will be provided in email. Its ok to email me. We need to customize the Customer GUI and we also need customization using Kamailio, FreeSwitch and OPenSIPS.
I am responsible for a similar platform based on Asterisk, A2Billing
Kamailio for VoIP provider in Congo DRC. So I can easily configure and customize your platform.