The DS2291 T1 Long Loop Stik contains all the circuitry necessary to recover clock and data from a T1 line. The DS2291 contains an Automatic Line Build Out (ALBO) circuit that allows it to adapt to T1 lines varying in length from 0 to 6,000 feet. It also will dejitter the recovered clock and data according to the jitter attenuation curves outlined in AT&T Communications Document TR 62411 (Accunet* T1.5 Service Description and Interface specification - December 1990). Applications area include Channel Service Units (CSU), T1 monitoring equipment, and T1 test equipment.