2. Product Specifications and Description
NOTE
This main board is for all models of the SL-X4300/4250/4220 series
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Part Name : PBA-MAIN
3) Master System Operation Key (MSOK)
MSOK PBA is used to store all system information and consists of serial flash memory, a EEPROM and a X-CRUM. The
flash memory(4MByte), EEPROM(256Kbit) and X-CRUM are used for all system operation(system parameter, device
status, tech information, and service information).
NOTE
When a main board needs to be exchanged, the MSOK PBA should be re-installed to the new main board to retain the system
information.
•
Information
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Part Code : JC92–02431A
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Part Name : PBA-MSOK
4) FAX JOINT PBA
The FAX JOINT PBA is used for interfacing between the main board and modem PBA. It uses UART for interface.
•
Information
-
Part Code : JC92-02743A (for Dual Fax) / JC92-02743B (for Single Fax)
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Part Name : PBA-FAX JOINT
•
Connection
1
Main PBA I/F connector
2
Modem Card I/F connector (1st)
3
Modem Card I/F connector (2nd)
2-90
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