4.3.7 EXP-S in an Expansion Unit (installed by default)
Function
• EXP-S is pre-installed in the SPR card of KX-NS720
to use the unit as an Expansion Unit.
• By using this card, you can expand the Usage of Legacy CO Lines and extensions.
Pin Assignments
For EXP-S port
No. Signal Name Function
1 UHW+ Receive data+
2 UHW- Receive data-
3 REFCLK+ Reference CLK+
4 FHCLK+ Frame and System CLK+
5 FHCLK- Frame and System CLK-
6 REFCLK- Reference CLK-
7 DHW+ Transmit data+
8 DHW- Transmit data-
Document Version 2016-03 Installation Manual 117
4.3.7 EXP-S in an Expansion Unit (installed by default)
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