Description
The Multiple Rate Digital Switch (MRDX) is an upgraded version of Zarlinks MT8980D Digital Switch (DX). It is pin compatible with the MT8980D and retains all of its functionality. This device is designed to provide simultaneous connections (non-blocking) for up to 256 64 kb/s channels or blocking connections for up to 512 64 kb/s channels. The serial inputs and outputs connected to MT8986 may have 32 to 128 64 kb/s channels per frame with data rates ranging from 2048 up to 8192 kb/s. The MT8986 provides perchannel selection between variable and constant throughput delays allowing voice and grouped data channels to be switched without corrupting the data sequence integrity.

Features
• 256 x 256 or 512 x 256 switching configurations
• 8-bit or 4-bit channel switching capability
• Guarantees frame integrity for wideband channels
• Automatic identification of ST-BUS/GCI interfaces
• Accepts serial streams with data rates up to 8.192 Mb/s
• Rate conversion from 2.048 Mb/s to 4.096 or 8.192 Mb/s and vice-versa
• Programmable frame offset on inputs
• Per-channel three-state control
• Per-channel message mode
• Control interface compatible to Intel/Motorola CPUs
• Low power consumption

Applications
• Medium size digital switch matrices
• Hyperchannel switching (e.g., ISDN H0)
• MVIP™ interface functions
• Serial bus control and monitoring
• Centralized voice processing systems
• Voice/Data multiplexer
• 32 kbit/s channel switching