New Edge Networks, the business communications unit of EarthLink (NASDAQ:ELINK), has unveiled a new network service that allows businesses to tag and prioritize data traffic over DSL access using up to five MPLS classes of service.

As applications and data traffic mount, small and midsize businesses require more bandwidth or better throughput. Until now, data traffic tagging and prioritization with true classes of service were available only on T1 lines with MPLS. With MPLS class of service over DSL, businesses can reduce monthly communications costs while optimizing use of high-speed DSL access.

"This breakthrough service helps small and midsize businesses avoid network congestion problems due to the convergence of communications applications such as VoIP phone calls and other latency-sensitive services over DSL access," Greg Griffiths, vice president of marketing for New Edge Networks, said in a statement.

Griffiths said network bottlenecks and data traffic congestion bog down application performance and business productivity, while MPLS allows businesses to add additional applications over their DSL-based network without the risk of compromising performance.