Can I connect 4 Sites with one Link

Dear Brothers,

I am looking for a solution for the following needs

  1.    I have 4 VOIP gateways in different location.
    
  2.    These are connected with the same ISP using PPOE(DSL)  Because I need to use only the Physical network of ISP. With VPN dialer
    
  3.    My Main site has one Mikrotik router with static(live) IP address on one DSL.
    
  4.    I have 5 DSL connection in main site which have 4mbps down and 1mbps unlink on each DSL.
    

Requirement

  1.    I need that all the traffic will come on Main site and move to the VIOP gateways
    
  2.    That load should be equally upload using DSL connections
    

Please guide me what kind of codes should I write in Main site that can perform my require tasks

Muhammad Yousaf
4 DSL Link.jpg

Sounds like a standard PCC load balancing with scrs-address as classifier should work. Have a look at the WIKI there is a PCC example that works.