May 2001
System Hardware Manual 5 - 111
A6-324000-642-01 – Release 4.0
May 2001
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
To Next Page
Loading...
