12.7. Parallel Connection Detect Circuit
Function:
In order to disable call waiting and stutter tone functions when using telephones connected in parallel, it is necessary to have
a circuit that judges whether a telephone connected in parallel is in use or not. This circuit determines whether the telephone
connected in parallel is on hook or off hook by detecting changes in the T/R voltage.
Circuit Operation:
Parallel connection detection when on hook:
When on hook, the voltage is monitored at pin 86 of IC501. There is no parallel connection if the voltage is
1.65 V or higher, while a parallel connection is deemed to exist if the voltage is lower.
Parallel connection detection when off hook:
When off hook, the voltage is monitored at pin 90 of IC501; the presence/absence of a parallel connection is determined when
the voltage changes by 0.2 V or more.
59
KX-TG5671BXS / KX-TGA560BXS
Содержание KX-TG5671BXS
Страница 7: ...4 1 3 Battery Level 4 1 4 Panasonic Battery Performance 7 KX TG5671BXS KX TGA560BXS ...
Страница 8: ...4 2 Location of Controls 4 2 1 Base Unit 8 KX TG5671BXS KX TGA560BXS ...
Страница 9: ...4 2 2 Handset 9 KX TG5671BXS KX TGA560BXS ...
Страница 10: ...4 3 Displays 4 3 1 Display Items 4 3 2 Troubleshooting Handset LCD 10 KX TG5671BXS KX TGA560BXS ...
Страница 11: ...4 4 Settings 4 4 1 Connecting the AC Adaptor and Telephone Line Cord 11 KX TG5671BXS KX TGA560BXS ...
Страница 13: ...4 4 2 2 Programming Using the Direct Commands 13 KX TG5671BXS KX TGA560BXS ...
Страница 14: ...4 4 3 Dial Lock 14 KX TG5671BXS KX TGA560BXS ...
Страница 15: ...4 5 Troubleshooting 15 KX TG5671BXS KX TGA560BXS ...
Страница 16: ...16 KX TG5671BXS KX TGA560BXS ...
Страница 17: ...17 KX TG5671BXS KX TGA560BXS ...
Страница 20: ...6 HOW TO REPLACE THE HANDSET LCD 20 KX TG5671BXS KX TGA560BXS ...
Страница 31: ...7 9 5 RF DSP Interface Signal Wave Form Test Burst Mode 31 KX TG5671BXS KX TGA560BXS ...
Страница 32: ...Test Burst Mode 32 KX TG5671BXS KX TGA560BXS ...
Страница 70: ...17 2 Power Supply Circuit Voltage is supplied separately to each block 70 KX TG5671BXS KX TGA560BXS ...
Страница 73: ...18 SIGNAL ROUTE Each signal route is as follows 73 KX TG5671BXS KX TGA560BXS ...
Страница 74: ...Each signal route is as follows RF part signal route 74 KX TG5671BXS KX TGA560BXS ...
Страница 77: ...21 EXPLANATION OF IC TERMINALS RF PART 21 1 IC701 77 KX TG5671BXS KX TGA560BXS ...
Страница 78: ...21 2 IC801 Backside Terminal GND 78 KX TG5671BXS KX TGA560BXS ...
Страница 79: ...21 3 IC851 Backside Terminal GND 79 KX TG5671BXS KX TGA560BXS ...
Страница 84: ...24 CABINET AND ELECTRICAL PARTS BASE UNIT 84 KX TG5671BXS KX TGA560BXS ...
Страница 87: ...27 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 27 1 Base Unit 27 2 Handset 87 KX TG5671BXS KX TGA560BXS ...
Страница 99: ...Memo 99 KX TG5671BXS KX TGA560BXS ...
Страница 104: ...Memo 104 KX TG5671BXS KX TGA560BXS ...
Страница 110: ...Memo KX TG5671BXS KX TGA560BXS 110 ...
Страница 114: ...114 KX TG5671BXS KX TGA560BXS A I N KXTG5671BXS KXTGA560BXS ...