- PC with 2 GHz
- 2 GB memory
- 1 GB free hard-disk space
PC-Server – Software
- Microsoft Windows XP (SP3), Vista (SP2), Windows 7 (SP1), Windows 8
- Microsoft Windows Server 2003 & 2008, Server 2003 R2 & 2008 R2 (SP1), Server 2012
- Microsoft Windows Small Business Server 2008 & 2011
- Compatible with 32 & 64 bit Microsoft Windows OS
PC-Client – Software Windows
- Microsoft Windows XP (SP3), Vista (SP2), Windows 7 (SP1), Windows 8
- Compatible with 32 & 64 bit Microsoft Windows OS
PC-Client – Software Apple
- Mac OS X 10.6.8 Snow Lion, Mac OS X 10.7 Lion and Mac OS X 10.8 Mountain Lion
- Optional Outlook Mac 2011 14.2.4 and 14.3.1
Federation
- Internet connection with a fixed IP address
- Port forwarding
- Open Service Location Record for SIP and/or XMPP
Optional Environment
- Aastra MetaDirectory version 3.5 is required for the integration of CRM, ERP and business solutions
- Microsoft Exchange 2003 or higher
- Microsoft Outlook 2003, 2007
- Microsoft Outlook 2010, 2013 (32 / 64 bit)
- Lotus Notes 6.5.4 or higher
- Tobit David InfoCenter David.fx, David.fx 2011 Edition, David.fx 2012
- Microsoft Windows Terminal Server 2003 or higher
- Citrix XenApp™ version 5.0 (in application sharing mode without hotkey dialling and without monitor docking)
- VMWare, version 4.5 or higher
- Virtual Server version 2005 R2 SP1 (x86 and x64) or higher
- Virtual PC version 2007 SP1 (x86 and x64) or higher
- Hyper-V, version 6.1.7600 or higher