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