MT90812集成电路（IC）的电信规格书PDF中文资料

描述 Description

By integrating key functions needed in voice telecom application, the Integrated Digital Switch (IDX) provides a solution-on-a-chip for key telephone systems, PBX applications or CTI designs. Figure 2 shows a typical configuration.

特性 Features

• 192 channel x 192 channel non-blocking switching

• 2 local bus streams @ 2Mb/s supports up to 64 channels

• In TDM mode, the expansion bus supports up to 128 channels at 8.192 Mb/s

• Rate conversion capability between local and expansion bus streams

• Integrated conference bridge, supporting 15 parties over 5 bridges

• Integrated PLL

• Frequency Shift Keying (FSK) 1200 baud transmitter, meeting Bell 202 or CCITT V.23 standards

• 32 channel dual tone generator, including 16 standard DTMF tones and tone ringer

• Expansion bus in IDX Link mode, allows the interconnection of up to 4 IDX devices

• Programmable per channel gain control from +3 to -27dB, increments of 1dB for output channels

• Supervisory signalling cadence detection capability

• HDLC resource allocator

• D-channel buffering of message information

• C-channel access for control and status registers

• Provides both variable and constant delay modes

• Parallel microprocessor port, compatible to Intel and Motorola and National CPU’s

• Supports both A-law or u-law operation

• Supports both ST-BUS, GCI and HMVIP framing formats

Applications

• Computer Telephony Integration (CTI)

• Key Telephone Systems

• Private Branch Exchange (PBX) Systems