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System Hardware Manual
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3.3
MBD-U13 Unit for B48-U13 KSU (Xen Axis Only)
3.3.1
Description
The MBD-U13 Unit (installed on the B48-U13 KSU) is the
Central Processing Unit for the Xen Axis system. This ETU
has a Central Processing Unit and a Microprocessing Unit
and supports a maximum of 48 ports. Refer to Figure 5-10
KSU MBD-U13 Unit.
A 32-bit microprocessor executes the programs stored on
the Flash ROM ICs of the MBD-U13 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)
✆
8 Electronic Station Interface (ESI) ports
✆
6 Flexible Card Slots
Содержание Xen Master
Страница 1: ...System Hardware Manual NEC Australia Pty Ltd A6 324000 642 01 Release 4 0 May 2001...
Страница 37: ...May 2001 System Hardware Manual 2 19 A6 324000 642 01 Release 4 0 May 2001 Figure 2 1 System Block Diagram...
Страница 123: ...May 2001 System Hardware Manual 5 105 A6 324000 642 01 Release 4 0 May 2001 Figure 5 7 CPUB U13 ETU...