Read Panasonic KX-TDA0158CE Service Manual online
7
KX-TDA0158CE
4.2.3.
Line Interface
This circuit handles data communication from DHLC(DLC) card to CS. CS is connected to DHLC(DLC) card by 4 adjacent ports.
The signal from DHLC(DLC) card is provided to CN100, and provided to comparator (IC108-115) via filter and pulse transformer
(T100-103). These digital data is transferred to FPGA (IC103)
The signal from DHLC(DLC) card is provided to CN100, and provided to comparator (IC108-115) via filter and pulse transformer
(T100-103). These digital data is transferred to FPGA (IC103)
Note:
The GND of CS(KX-TDA0158CE) is not common to the GND of the PBX itself, care must be taken when using a measuring
device such as an oscilloscope. (Make sure to use the measuring device with its frame ground open.)
device such as an oscilloscope. (Make sure to use the measuring device with its frame ground open.)
SYNC (5bit)
:Synchronization bit
MAN (3bit)
:Frame header detection
Cch (1bit)
:Control channel
Dch (2bit)
:Data channel
B1ch, B2ch (8bit) :Bearer channel
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