Panasonic KX-TDA0170, Service Manual

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- APT data communications
Control data is transmitted from the DTL terminal of ASIC, then is
output to APT (between D1 and D2) by way of the driver U5 and
the pulse transformer T1.
The control data transmitted from APT is input to the DR terminal
of ASIC by way of the pulse transformer T1 and R13. ASIC
compares VREF+ with the input waveform, and receives a valid
pulse.
- DPT data communications
Bch/Dch/Cch data is transmitted from the DTL/DTH terminal of
ASIC, and the AMI-converted pulse signal is output to DPT
(between D1 and D2) by way of the driver U5 and the pulse
transformer T1. The Bch/Dch/Cch data transmitted from APT is
input to the DR terminal of ASIC by way of the pulse transformer
T1 and R13. ASIC compares VREF+ and VREF- with the input
waveform, and receives a valid pulse.
- Bch communications
Communicated by the PCM data (64kbps × 2) connected from the
local highway by ASIC.
Used mainly for the audio signal of DPT.
- Dch communications
Communicated by the data (16kbps) protocol-converted by the
HDLC controller in ASIC.
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