Read Panasonic KX-NS0290CE Service Manual online
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KX-NS0290CE
4.3.1.7.
Surge Protection
Thyristor is installed between T or R and FG protect from extraneous surge.
4.3.1.8.
Bell Signal Generator and Transmission
In ringing mode, the ringing DC offset and the ringing signal are summed digitally within CODEC in accordance with the pro-
grammed values.
This signal is then converted to an analog signal and applies to the SLIC.
The SLIC amplifies the signal and supplies the line with 65 Vrms.
The bell signal is generated with +80V(VHR) and -55V (VBAT) supplied to SLIC.
grammed values.
This signal is then converted to an analog signal and applies to the SLIC.
The SLIC amplifies the signal and supplies the line with 65 Vrms.
The bell signal is generated with +80V(VHR) and -55V (VBAT) supplied to SLIC.
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