16Sli2/16Mwsli Board - Samsung OFFICESERV 7100 Service Manual

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Voice Signal Processor Block
This block converts the voice band analog signal into the Digital PCM. The voice band
analog signal reception block performs the supervision processing input. The voice
signal processor block performs the function to manipulate the voice band signal
control, such as Gain Control/2-4Wire RL control/Frequency characteristic control, via
the software control.
Switching Regulator Controllers.
This circuit is added to the Le88241 to create high voltage, such as Feeding voltage and
Ringing signal, required for the operation of the SLT Interface. The switching regulator is
controlled by the Le88241 in term of software. In short, feeding current/voltage and
ringing signal voltage/frequency are controlled by the SPI command.

2.5.7 16SLI2/16MWSLI Board

The 16SLI2 board is the board to provide 16-port of analog extension lines and provides
the voice communication function by interworking with general phones via extension lines.
The 16MWSLI board is the board that the message waiting function is added to the functions
of the 16SLI2 board.
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