Asterisk Queue Setup

I have a production asterisk installation running on my server. I have a requirement. I want to setup a queue such that Agents and end users can use queue using their mobile phones. Lets Say, their are 3 agents Agent 1: Mobile : +91-XXXXXXXXX1 Agent 2: Mobile : +91-XXXXXXXXX2 Agent 3: Mobile : +91-XXXXXXXXX3 Lets there are 5 users who will dial in and will be send to queue to be answered by Agents. User 1: Mobile : +91-XXXXXXXX11 User 2: Mobile : +91-XXXXXXXX12 User 3: Mobile : +91-XXXXXXXX13 User 4: Mobile : +91-XXXXXXXX14 User 5: Mobile : +91-XXXXXXXX15 Any camm from +91-XXXXXXXXXX(Agent or user) come to my SIP and thus to my dialplan. If Agent calls he should be loged in as an agent If user calls he should be transferred to a Logged in user. Rewording the above requirement. I have my Agents say A1,A2,A3 on remote location. I have my callers C1,C2,C3,C4,C5 too on remote location. I have a SIP installed on my server which is under a production usecase. I will assign two DID say DID1 to Agnets and DID2 to Callers. Agents will call DID1 and login to queue. Calls will call DID2 and can chat with Agents that have logged in into the queue. That is it.