Buy Direct Telecom sells new and refurbished Nortel Networks Norstar T-Series Phones at unbeatable prices. All Nortel T-Series phones are backed by an amazing 2 year warrenty. Choose from our inventory of T7316e, T7208 T7406, and T7100 business phones. As the next-generation business phone systems that build on the Norstar Telephone Portfolio, the Business Series Terminals set the standard for durability, reliability and flexibility. These products can be deployed to support both the Business Communications Manager and Norstar systems with full backward-compatibility, so you can add them to your existing voice infrastructure to cost-effectively scale voice connectivity as your business grows.