If you have just created your own business and need to setup a computing infrastructure for your new office, but are unable to buy expensive software and many of your employees work remotely - in this case, I suggest the installation and initial configuration of the remote virtual office using free software:
- VPS-server based on Zentyal (DHCP, DNS, VPN, Firewall, Proxy, Mail server with interoperability for Microsoft Outlook clients and other features);
- corporate-level ERP solution (OpenERP);
- cloud-based PBX with cheap rates for international calls (even cheaper than Skype), IVR and fax support.
Finally, you will get a fully computerized and telephonized office with minimal montly costs for its maintenance.