FEATURES
LINE INTERFACE
• Each link can be configured as T1, E1 or J1
• Supports T1/E1/J1 long haul/short haul line interface
• HPS for 1+1 protection without external relays
• Receive sensitivity exceeds -36 dB @ 772 Hz and -43 dB @ 1024 Hz
• Selectable internal line termination impedance: 100 Ω (for T1), 75 Ω / 120 Ω (for E1) and 110 Ω (for J1)
• Supports AMI/B8ZS (for T1/J1) and AMI/HDB3 (for E1) line encoding/decoding
• Provides T1/E1/J1 short haul pulse templates, long haul LBO (per ANSI T1.403 and FCC68: 0 dB, -7.5 dB, -15 dB, -22 dB) and userprogrammable arbitrary pulse template
• Supports G.772 non-intrusive monitoring
• Supports T1.102 line monitor
• Transmit line short-circuit detection and protection
• Separate Transmit and Receive Jitter Attenuators (2 per link)
• Indicates the interval between the write pointer and the read pointer of the FIFO in JA
• Loss of signal indication with programmable thresholds according to ITUT-T G.775, ETS 300 233 (E1) and ANSI T1.403 (T1/J1)
• Supports Analog Loopback, Digital Loopback and Remote Loopback
• Each receiver and transmitter can be individually powered down

FRAMER
• Each link can be configured as T1, E1 or J1
• Frame alignment/generation for T1 (per ITU-T G.704, TA-TSY- 000278, TR-TSY-000008), E1 (per ITU-T G.704), J1 (per JT G.704) and un-framed mode
• Supports T1/J1 Super Frame and Extended Super Frame, T1 Digital Multiplexer and Switch Line Carrier - 96, E1 CRC Multi-frame and Signaling Multi-frame
• Signaling extraction/insertion for CAS and RBS signaling
• Provides programmable system interface supporting MitelTM STbus, AT&TTM CHI and MVIP bus, 8.192 Mb/s multiplexed bus and 1.544 Mb/s or 2.048 Mb/s non-multiplexed bus
• Three HDLC controllers per link with separate 128-byte transmit and receive FIFOs per controller
• Programmable bit insertion and bit inversion on per channel/ timeslot basis
• Provides Bit Oriented Message (BOM) generation and detection
• Provides Automatic Performance Report Message (APRM) generation
• Detects and generates alarms (AIS, RAI)
• Provides performance monitor to count Bipolar Violation error, Excess Zero error, CRC error, framing bit error, far end CRC error, out of frame and change of framing alignment position
• Supports System Loopback, Payload Loopback, Digital Loopback and Inband Loopback
• Detects and generates selectable PRBS and QRSS
• Transmission and Extraction of Synchronization Supply Message (SSM) in BITS application

CONTROL INTERFACE
• Supports Serial Peripheral Interface (SPI) microprocessor and parallel Intel/Motorola non-multiplexed microprocessor interface
• Global hardware and software reset
• One general purpose I/O pin
• Per link power down

GENERAL
• Flexible reference clock (N x 1.544 MHz or N x 2.048 MHz) (0<N<5)
• JTAG boundary scan
• 3.3 V I/O with 5 V tolerant inputs
• Low power consumption (Typical 270 mW)
• 3.3 V and 1.8 V power supply
• 100-pin TQFP package

APPLICATIONS
• C.O, PABX, ISDN PRI
• Wireless Base Stations
• T1/E1/J1 ATM Gateways, Multiplexer
• T1/E1/J1 Access Networks
• LAN/WAN Router
• Digital Cross Connect
• SONET/SDH Add/Drop Equipment
• Clock recovery at 1.544 MHz / 2.048 MHz for BITS application with SSM support