Read Panasonic KX-DT590RU / KX-DT590RU-B Service Manual online
8
KX-DT590RU/KX-DT590RU-B
4.2.4.
Data Communication Circuit
Function:
The data communication circuit serves the following functions:
Exchanges information between the PBX and DSS console and key input information as well as data for the LED control, etc. This
information is exchanged continuously at all times.
The data communication circuit serves the following functions:
Exchanges information between the PBX and DSS console and key input information as well as data for the LED control, etc. This
information is exchanged continuously at all times.
Circuit Operation:
When the DSS console receives an IRQ signal from the PBX, after it sends the key input information (19 pulses) to the PBX and
receives the data (47 pulses) for the LED control, etc., the DSS console will send an acknowledge signal to the PBX.
When the DSS console receives an IRQ signal from the PBX, after it sends the key input information (19 pulses) to the PBX and
receives the data (47 pulses) for the LED control, etc., the DSS console will send an acknowledge signal to the PBX.
1) Reception
The data from the DSS console is received via the H and L line along the path shown below.
H, L Line
The data from the DSS console is received via the H and L line along the path shown below.
H, L Line
D1 T1 R24 Q2 R55 IC1 Pin 49
2) Transmission
The data to the DSS console is transmitted along the following path.
IC1 Pin 15
The data to the DSS console is transmitted along the following path.
IC1 Pin 15
R22 Q1 T1 D1 H, L Line
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