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• Wireless basestations• E1/T1/J1 ATM gateways, multiplexer• E1/T1/J1 Channel & Data Service Units (CSU, DSU)• E1/T1/J1 Internet access equipment• LAN/WAN router• ISDN PRI, PABX• Digital Access Crossconnect Systems (DACS)• SONET/SDH add/drop multiplexer
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Line Interface• High-density, generic interface for all E1/T1/J1 applications• Analog receive and transmit circuits for long-haul and short-haul applications• E1 or T1/J1 mode selectable• Data and clock recovery using an integrated digital phase-locked loop• Maximum line attenuation up to -43 dB at 1024 kHz (E1) and up to -36 dB at 772 kHz (T1/J1)• Programmable transmit pulse shapes for E1 and T1/J1 pulse masks• Programmable line build-out for CSU signals according to ANSI T1. 403 and FCC68: 0dB, -7.5dB,-15dB, -22.5 dB (T1/J1)• Low transmitter output impedances for high transmit return loss• Tristate function of the analog transmit line outputs• Transmit line monitor protecting the device from damage• Receive line monitor mode• Jitter specifications of ITU-T I.431, G.703, G.736 (E1), G.823 (E1) and AT&T TR62411 (T1/J1) are met• Crystal-less wander and jitter attenuation/compensation• Common master clock reference for E1 and T1/J1 (any frequency within 1.02 and 20 MHz)• Power-down function• Support of automatic protection switching• Dual-rail or single-rail digital inputs and outputs• Unipolar NRZ or CMI for interfacing fiber-optical transmission routes• Selectable line codes (E1: HDB3, AMI/T1: B8ZS, AMI with ZCS)• Loss-of-signal indication with programmable thresholds according to ITU-T G.775,ETS300233 (E1) and ANSI T1.403 (T1/J1)• Optional data stream muting upon LOS detection• Programmable receive slicer threshold• Clock generator for jitter-free system/transmit clocks per channel• Local loop and remote loop for diagnostic purposes• Low power device, single power supply: 3.3 V with 5 V tolerant digital inputsFrame Aligner̶
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Required Field 
