RealNetworks has released an update to its Helix Server Unlimited software that adds the capability to stream video and audio content to wireless devices.

The software is aimed at organizations that want to stream content to employees, partners and customers. It already supported several formats, including RealNetworks' own RealAudio and RealVideo, Windows Media, QuickTime, MP3 and MPEG4.

The updated version adds support for 3GPP technology for streaming content to handsets and other mobile devices developed by an industry alliance called the 3rd Generation Partnership Project, RealNetworks said Wednesday. The 3GPP support is offered as an "optional extra," the company said. Pricing wasn't immediately available.

The update also adds support for IPv6 (Internet Protocol version 6) and a newer version of the SNMP (Simple Network Management Protocol), and has better firewall security, according to RealNetworks. It is available for several platforms including Solaris, Windows and Linux.

The City of Seattle, where RealNetworks is based, has been using Helix Server Unlimited to stream television programs to its residents and will now add a service for handsets, RealNetworks said. Virginia's Polytechnic and State University (Virginia Tech) will also use the update to stream content wirelessly to its students, the company said.

RealNetworks has a few Helix server products. Helix Server Unlimited is the only one for delivering "unlimited" streams, the other two are capped at 25 or 100 streams. Media companies with more than $50 million annual revenue and ISPs with more than 200,000 subscribers aren't eligible to buy the Helix products, according to RealNetworks' Web site.

The products compete with software from Microsoft, Macromedia and Apple, among others. Separately this week, Macromedia announced the release of its Flash Media Server 2 content delivery system. It has new load-balancing, failover and clustering features to make the product scale more easily, according to Macromedia. Pricing starts at $4,500 for a two-CPU Professional Edition license, the company said.