Solution providers polled consider Nortel Networks a Channel Contender for its incumbent VoIP offering. It's no surprise. Nortel built its name on legacy TDM and grew into VoIP and unified communications at just the right time. While Nortel's future in VoIP may be uncertain as it navigates Chapter 11 bankruptcy protection, it still has the chops in the VoIP arena to keep plugging along as Nortel TDM customers look to upgrade to the VoIP world. As of this writing, Nortel was looking to auction off its enterprise solutions business, which includes its VoIP solutions, and Avaya is the lead bidder with an offer of $475 million.