The PM4351 COMET device is a monolithic single-channel solution integrating software selectable full-featured T1 and E1 framers and T1 and E1 short haul and long haul line interfaces. Applications • Wireless Base Transceiver Station and Digital LoopCarriers (DLCs). • BITS Timing Systems. • Integrated Access Device (IAD). • Channel and Data Service Units (CSU/DSU). • Enterprise Routers. • V5.1/V5.2 Interfaces.