Urgently required pbx system

VOIP, PBX System Required for Complete Solution for Small Business- Urgent Requirement —

Asterisk or any other system if any one could provide me the details and quotation I will be thankful in advance.
My Requirements Details:

  1. Connectivity of PBX system between two Cities like ISB and LHR.(CITY OF PAKISTAN)
  2. Each Site having 30 User’s. (Total 60 User’s)
  3. Both end required server’s.
  4. And phone’s set’s will be required 60 and both one one Main Phone Set.
  5. And how many channel will required that thing you can also quote.
  6. Internet Connectivity and Telephone line we will provide you.
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