Dinstar UC2000-VE-4T + FreePBX/Asterisk + Retell AI Voice Setup

Dinstar UC2000-VE-4T + FreePBX/Asterisk + Retell AI Voice Setup Project Description We are looking for an experienced individual VoIP/Asterisk freelancer to configure a small business telephone system. Hardware available: Dinstar UC2000-VE-4T LTE/VoLTE Gateway 2 mobile SIM cards initially 4 available gateway channels Required configuration: Install and configure FreePBX/Asterisk Configure the Dinstar UC2000-VE-4T with 2 SIM cards Create two completely independent inbound/outbound call routes Configure two remote SIP softphone users working from PCs/mobile phones Each user must make and receive calls through their assigned SIM/number Incoming caller ID should be passed correctly to the remote user Configure correct outbound routing so each user always calls through their assigned SIM Integrate 2 separate Retell AI voice agents/accounts Incoming new calls should first be answered by the appropriate Retell AI agent Configure AI-to-human call transfer to the appropriate softphone Configure callback/outbound calling through the correct SIM Configure basic PBX/network security Test simultaneous calls, audio quality, caller ID, transfers, inbound and outbound routing Provide basic documentation/admin handover after setup Implementation/Test Stages Stage 1: Dinstar → FreePBX/Asterisk → remote softphones. Both numbers must work independently for incoming and outgoing calls. Stage 2: FreePBX/Asterisk → Retell AI integration for both numbers, including AI-to-human transfer. Freelancer Requirements Strong practical experience with: Asterisk / FreePBX Dinstar or similar GSM/LTE/VoLTE gateways SIP trunks and SIP routing Remote SIP softphones NAT/firewall/security configuration Retell AI, Vapi or another AI voice/SIP platform preferred Please mention in your proposal: 1. Your experience with Dinstar/GSM-LTE gateways 2. Your experience with FreePBX/Asterisk 3. Whether you have previously integrated Retell AI, Vapi or another AI voice agent with Asterisk/SIP 4. Your recommended softphone 5. Your fixed price for the complete setup and testing 6. Estimated completion time