We would like to setup a LYNC 2013 enviroment.
We have many offices across multiple countries. The branch offices just have Internet connection.
There is NO MPLS network between offices.
The requirement is to make voice call between users in different office across countries.
We would have to host LYNC infrastructure only at one Central site.
There is NO requirement for any PSTN or PBX integration.
The users should have access to federation like Facebook, Gtalk etc.
Pls suggest how can I architect such a Lync solution. Whats are the hardware/software components required essentially?
Kindly advice
Anand Dutta