IP communications changed the Organization of Berlin, August 2009 the rigid communication infrastructures in companies should be replaced by a new generation of devices. The special programming of conventional ISDN system gives way to the standard programming of an IP or hybrid solution. The latter have according to economists a great advantage: based on LAN cables in corporate telephones can be connected just already desktop PC or notebooks on the corporate network. An extra wiring for the voice telephony is no longer necessary. The smart devices adapt to easier the user and their needs. You must no longer sit at his workplace in the Office to retrieve all technological resources, so the analysis of the Berlin ICT specialists Aastra. With convergent communication technologies, you could do the work everywhere. It’s interesting especially for professions, working is knowledge-based. The two pillars for flexible working: VoIP and virtual private Networks (VPNs). The latter guarantee secure access to the corporate network. IP phones would play an increasingly important role. And the interface problems played hardly any role in the world of the Internet Protocol most devices are SIP-capable. \”You rely on the communication standard Session Initiation Protocol\”, which today characterizes IP telephony significantly. Was previously the maxim works in a fixed structure, at the fixed place, and at the particular time, the developments allow for working the IT – and telecommunications industry with whom, where and when you want\”. We are looking for in the easy economy\”according to Markus Albers, author of the book tomorrow I come later\”especially experts, mobile and flexible working by definition. Currently only 10 percent of workers in Germany entirely or partly from home work out according to a BITKOM poll. But 62 percent want regular work at the Home Office, 41 percent in a few days in the week and 21 percent even daily. 28 per cent of respondents Workers go most every day in the Office.