Panasonic KX-TA1232, Руководство по обслуживанию

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Function Description
Ring detection function Detecting the bell signals from the stations.
Catch of CO lines function Catching the CO lines by making the DC current loop.
End of call function CPU detection
Dial pulse transmission
function Out-put the dial pulse to the lines by switching the DC loop on and off.
2-4 wires convert 2 w. signals from the stations are converted in 4 w.
A/D, D/A convert Converting between 4 w. analog signals and PCM digital signals.
Transfer during power
failure Having 4 direct paths to the extensions for transferring when the power
fails.
(4) BASIC EXT BOARD
BASIC EXT BOARDS are installed into the system as standards, and play a roll of the interface
between the system and the terminals.The terminals which are connectable with board are SLT
and APT. 8 lines per one card are covered and they allow a parallel connection of SLT and APT
(mother and daughter operation).
Terminal Function Description
SLT Power supply Supplying the power to SLT for calling.
Hook detection Detection of On-hook and Off-hook when the
bell signal is not presented.
Ring trip detection Detection of Off-hook when the bell signal
presented.
Dial pulse detection
Detection of pulse dial
DTMF tone detection Detection of DTMF tone
Switching in power failure Connecting directly between the CO line and
the terminal when power fails. 1 line
SLT APT 2-4 w. convert Converting 2 w. from the terminals into 4 w.
A/D, D/A convert Converting between 4 w.-analog signals and
PCM digital signals by CODEC
APT Data transmission Communication with the APT about the
control data such as the key information, the
ramp information.
(5) MOTHER BOARD
Each board of CPU, CO BOARD, EXT BOARD etc. is powered through the MOTER BOARD, and
also transmits the signals through it.
(6) LED BOARD
LED BOARD is for installing LED which shows the operating status.
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