The ISDN Digital Exchange Controller PEB 2075 IDEC is a serial HDLC data communication circuit with four independent channels. Its telecommunication specific features make it especially suited for use in variable data rate PCM systems. In addition, the device contains sophisticated switching functions and it implements automatic contention resolution between packet data from different sources.

Its applications include communication multiplexers, peripheral ISDN line cards, packet handlers and X.25 packet switching devices. The IDEC is a fundamental building block for networks with either centralized, de-centralized or mixed signaling/packet data handling architectures.