Description

The MT8931B Subscriber Network Interface Circuit (SNIC) implements the CCITT I.430 and ANSI T1.605 Recommendations for the ISDN S and T reference points. Providing point-to-point and point to-multipoint digital transmission, the SNIC may be used at either end of the subscriber line (NT or TE). An HDLC D-channel protocoller is included and controlled through a Motorola/Intel microprocessor port.

The MT8931B is fabricated in Mitel’s CMOS process.

Features

• CCITT I.430 and ANSI T1.605 S/T interface

• Full-duplex 2B+D, 192 kbit/s transmission

• Link activation/deactivation

• D-channel access contention resolution

• Point-to-point, point-to-multipoint and star configurations

• Master (NT)/Slave (TE) modes of operation

• Exceeds loop length requirements

• Complete loopback testing capabilities

• On chip HDLC D-channel protocoller

• 8 bit Motorola/Intel microprocessor interface

• Microprocessor-controlled operation

• Mitel ST-BUS interface

• Low power CMOS technology

• Single 5 volt power supply

Applications

• ISDN NT1

• ISDN S or T interface

• ISDN Terminal Adaptor (TA)

• Digital sets (TE1) - 4 wire ISDN interface

• Digital PABXs, Digital Line Cards (NT2)