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10 MAIN CARD CIRCUIT OPERATION
10.1. MAIN CARD
10.1.1. Outline
1) Function
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System Control
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Circuit Switching (includes gain adjustment function)
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Conference Call (3 party x 10 conference ~ 8 party x 4 conference)
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MOH
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PAGING
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Super Hybrid Ports (Extension port for DPT, APT and SLT)
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Serial Interface for PC-programming and database access (RS-232C and USB)
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DC/DC converter generates +15V, +5V, ±9.4V, +3.3V and +1.8V from 40V DC.
2) Configuration
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Power Supply: DC/DC Converter
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SD card I/F (for operating programs) x 1
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USB I/F (for PC programming) x 1
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RS-232C I/F (for PC-programming and SMDR)
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MOH: External sound input x 1
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PAGING: External output x 1
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Expanded memory connector x 1
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Modem card connector x 1
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4ch CODEC for Digital Super Hybrid Ports
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DTMF receiver for Digital Super Hybrid Ports
3) Operation Rating
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Power Input : +40V
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Power Output : +15V (for MOH)
+40V (for DHLC)
+3.3V (for I/O)
+3.3VB (for SRAM backup)
+1.8V (for CPU core)
+1.8VB (for clocking backup)
±9.4V (for RS-232C driver)
+5V (for RS-232C receiver)
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KX-TDA30UA
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