Overview

The PEB 2055 (Extended PCM Interface Controller) is a highly integrated controller circuit optimized for analog and ISDN line card and central switches applications. The EPIC-1 provides the circuitry necessary to manage up to 32 digital (ISDN or proprietary) or 64 analog subscribers.

特性 Features

Switching

? Board Controller for up to

– 32 ISDN or 64 analog subscribers (PEB 2055)

– 16 ISDN or 32 analog subscribers (PEB 2054)

? Non-blocking switch for

– 128 channels (PEB 2055)

– 64 channels (PEB 2054)

? Switching of 16-, 32-, or 64-kbit/s channels

? Two consecutive 64-kbit/s channels can be switched as a single 128-kbit/s channel

? Freely programmable time slot assignment for all subscribers

? Two serial interfaces (PCM and CFI) programmable over a wide data range (128 - 8192 kbit/s)

? Data rates of PCM and configurable interface independent from each other (data rate adaptation)

? PCM-interface

– Tristate control signals for external drivers

– Programmable clock shift

– Single or double data clock

? Configurable interface

– Configurable for IOM-, SLD- and PCM-applications

– High degree of flexibility for datastream adaptation

– Programmable clockshift

– Single or double data clock

? Synchronous μP-access to two selected channels

Handling of Layer-1 Functions

? Change detection for C/I-channel (IOM-configuration) or feature control (SLD-configuration)

? Double last-look logic for C/I-channel (IOM-2 analog configuration)

? Additional last-look logic for feature control (SLD-configuration)

? Buffered monitor (IOM-configuration) or signaling channel (SLD-configuration)

Bus Interface

? Siemens/Intel or Motorola type μP-interface

? 8-bit demultiplexed bus interface

? FIFO-access interrupt or DMA controlled