NEC R1000 manual Cpui -U ETU Description, B64-U23 KSU

September 2003 NEC Business Solutions Ltd

The installation instructions provided in this chapter apply to the basic B64-U23 KSU and the expansion B64-U23 KSUs unless otherwise specified.

Figure 2-1: B64-U23 KSU

1.2 CPUI( )-U( ) ETU

Description

The CPUI( )-U( ) ETU is the Central Processing Unit for the Xen IPK system. This ETU has a Central Processing Unit and a Microprocessing Unit.

A 32-bit microprocessor executes the programs stored on the Flash ROM ICs of the MPU unit. This controls the entire system when data is transferred to and from other ETUs.

This ETU provides the following items:

Time Division Switch (TDSW)

Static Random Access Memory (SRAM)

32-bit Processor

4-channel DTMF Receiver (PBR)

Sixteen 4-party Conference Circuits

Internal (digital music) Music-on-Hold source

External Music-on-Hold input (also used for station background music)

Flash ROM

Call Progress and DTMF Tone Generator

Doc. No. 8283 - Release 1.0 September 2003

22 – Chapter 2 Hardware Description and Specifications for Xen IPK