NEC Australia Pty Ltd Xen Master & Xen Axis
5 - 104 Installing Electronic Telephone Units
A6-324000-642-01 – Release 4.0
May 2001
S
ECTION
3
C
OMMON
C
ONTROL
ETU
S
The Electronic Telephone units described in this section control the common
functions of the KSU. The information applies to both the Xen Master and
Xen Axis systems unless stated otherwise.
3.1 CPUB( )-U13 ETU (Xen Master Only)
3.1.1 Description
The CPUB-U13 ETU is the Central Processing Unit for the
Xen Master system. This ETU has a Central Processing
Unit and a Microprocessing Unit and supports a maximum
of 192 ports.
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 includes 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
✆ Memory Backup Battery (Retains memory for
approximately 21 days)
3.1.2 Installation
Install this ETU in the CPU slot (first slot) of the B64-U13
KSU. One CPUB( )-U13 ETU is installed with each
system. Refer to Figure 5-7 CPUB( )-U13 ETU.
If the CPUB( )-U13 ETU is installed in slots
S1~S8, it will be damaged!
!
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