Books I have co-authored

Net Neutrality: AT&T blocks unwanted traffic types in their mobile network

Many critics of the EU Telecom Package have feared that the principle of Net Neutrality will be undermined and abandoned. One example of this is TeliaSonera, which has blocked VoIP and P2P file sharing in their cheaper Swedish data plans Mobilsurf Bas and Mobilsurf Alltid.

In May, AT&T also limited their mobile data traffic. In their [...]

It took five years – Skype largest in the world

Traffic data from Telegeography shows that Skype has eight percent of the international voice traffic market. This makes Skype the largest actor in the world when it comes to international voice (which includes both POTS voice and VoIP from Skype and others). During 2008 the number of Skype traffic minutes grew with 41 percent and [...]

Google Voice is launched: the market Verizon missed

Almost two years after Google bought the startup GrandCentral they have now launched their repackaged services under the brand Google Voice on the U.S. market. With Google Voice you can manage your telephony via the web and they have developed a suite of interesting but rather obvious services around call forwarding and voicemail. Google Voice [...]

Why did the vision for public W-Lan networks fail?

Today it is obvious that business models that are based on public Wlan networks will never live up to the hype from 2002-2004. The dramatic price pressure for mobile data via 3G/HSPA undermined the market for Wlan operators. The choice is easy between spotty Wlan coverage and comprehensive geographical service with a 3G dongle.

Other players [...]