AT&T Inc., has begun offering a VoIP telephone service in Detroit, Michigan, with rates as low as $20 per month. AT&T U-verse Voice is a digital voice service delivered over the AT&T U-verse Internet Protocol network.

AT&T’s digital phone service comes with a number of convenient perks, including an option for U-verse TV subscribers to view their call histories on their TV sets. Also included in the service are call forwarding, call screening, call display, and “do not disturb” and international call blocking options.

Vonage Holdings Corp. has settled a patent dispute with Canadian network equipment maker, Nortel Networks.

Vonage and Nortel Networks said they have agreed to end the litigation between them after the two companies reached a mutually beneficial agreement to cross license certain patents.

This settlement could mark the last of the string of patent suits against Vonage.

Japanese consumer electronics giant, Sony, has revealed that it is bringing Skype VoIP service to its PlayStation Portable gaming console.

However, Skype will only work on the PSP-2000 (ie: PSP Slim, PSP Lite, PSP Petite).

Skype, which is famous for offering free telephone calls over the internet, has grown to become a major international phenomenon in recent years, with 245 million people now registered to use the service on their PCs.