FEATURES

LINE INTERFACE

• The device 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  (for T1), 75

 / 120  (for E1) and 110  (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 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

• The receiver and transmitter can be individually powered down

FRAMER

• The device can be configured as T1, E1 or J1

• Frame alignment/generation for T1 (per ITU-T G.704, TA-TSY000278, 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 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

• Device power down

GENERAL

• Flexible reference clock (N x 1.544 MHz or N x 2.048 MHz)

(0

• JTAG boundary scan

• 3.3 V I/O with 5 V tolerant inputs

• Low power consumption (Typical 190 mW)

• 3.3 V and 1.8 V power supply

• 80-pin TQFP package