Description
The MT8910-1 Digital Subscriber Line Interface Circuit (DSLIC) is designed to provide ISDN basic rate access (2B+D) at the U-interface. Full duplex digital transmission at 160 kbit/s on a single twisted pair is achieved using echo cancelling hybrid (ECH) technology. This, in conjunction with the high performance 2B1Q line code, allows the DSLIC to meet the loop length requirements of the digital subscriber loops at the U-interface over the entire non-loaded telephone loop plant.

Features
• Compatible with ISDN U-Interface standard
• Over 40dB (@40 kHz) of loop attenuation
• Full duplex transmission over single twisted pair
• Advanced echo cancelling technology
• High performance 2B1Q line code
• Full activation/deactivation state machine
• QSNR and line attenuation diagnostics
• Frame and superframe synchronization
• On-chip 15 second timer
• Insertion loss measurement test signal & quiet mode
• Mitel ST-BUS compatible
• Single 5V power supply

Applications
• ISDN NT1 and NT2 DSL interface
• Digital PABX line cards and telephone sets
• Digital multiplexers and concentrators
• Pair gain system