Description

The PEF55218EV1.2 is an IC chip used in analog and ISDN line card and central switches for switching data between two serial interfaces, the system interface (PCM interface) and the configurable interface (CFI). It performs non-blocking time and space switching for up to 128 channels and allows for the switching of 16, 32, or 64 kbit/s channels. The EPIC-1 features a freely programmable time slot assignment for all subscribers and two serial interfaces (PCM and CFI) programmable over a wide data range (128-8192 kbit/s).

Specifications and features

• Circuit optimization for analog and ISDN line card and central switches applications
• Switching circuitry for up to 32 digital (ISDN or proprietary) or 64 analog subscribers
• Non-blocking switch for up to 128 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)
• Synchronous µP-access to two selected channels
• Siemens/Intel or Motorola type µP-interface
• 8-bit demultiplexed bus interface
• FIFO-access interrupt or DMA controlled

Application Scenarios

The PEF55218EV1.2 is commonly used in analog and ISDN line card and central switch applications for managing digital and analog subscribers, as well as for switching PCM data between two serial interfaces.

Comparison

• Highly integrated controller circuit
• Non-blocking time and space switching for up to 128 channels
• Two serial interfaces (PCM and CFI) programmable over a wide data range (128-8192 kbit/s)

• Limited to managing up to 32 digital (ISDN or proprietary) or 64 analog subscribers
• Switching limited to 16, 32, or 64 kbit/s channels