Lightly used in like new condition TN2464 DS1/T1/PRI trunk interface circuit board for the Lucent/Avaya Definity product family. Supports 24 port trunk usage on a T1 circuit either straight Ami/D4 or Pri B8zs/ESF framing. Paypal and money order accepted and exact shipping is precalculated. Bid with confidence and email with questions prior to bidding, i am a certified engineer for the Avaya product and will answer any questions you may have before you buy. Good Luck and Guaranteed no DOA.