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