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.

• Monolithic 3.3 V device that integrates an E1/T1/J1 Framer and line driver for shorthaul and longhaul applications
• Software selectable between T1/J1 and E1 operation on a per device basis
• Provides fully programmable shorthaul and longhaul pulse templates and line build out
• Meets or exceeds T1, J1, and E1 shorthaul and longhaul network access specifications, which include: ANSI T1.102, T1.403, T1.408, AT&T TR 62411, ITU-T G.703 and G.823, as well as the newer G.775 and ETSI 300-011 specifications
• Supports B8ZS, HDB3, and AMI line codes
• Provides receive clock recovery and line performance monitoring
• Provides on-board binary sequence generators and detectors that can be configured with various patterns for error testing, including those conforming to ITU-T 0.151
• Provides transmit and receive jitter attenuation
• Provides three full-featured HDLC controllers, each with 128-byte transmit and receive FIFOs, enabling dual compliance to the V5.1 and V5.2 interface standards
• Supports an IEEE P1149.1 JTAG test port
• Automatically generates DS1 performance report messages to ANSI T1.231 and other specifications
• Compatible with Mitel ST,-bus, AT&T CHI,, and MVIP PCM backplanes supporting rates of 1.544 Mbit/s, 2.048 Mbit/s, 4.096 Mbit/s and 8.192 Mbit/s
• Provides an 8-bit microprocessor bus interface for configuration, control, and status monitoring
• Low power +3.3 V CMOS technology
• Provides a -40 °C to +85 °C industrial temperature operating range