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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.
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KX-TG5631S / KX-TG5632M / KX-TG5633B / KX-TGA560S / KX-TGA560M / KX-TGA560B
Содержание KX-TG5631S
Страница 10: ...4 2 2 Handset 10 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 11: ...4 3 Displays 4 3 1 Display Items 11 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 12: ...4 3 2 Troubleshooting Handset LCD 12 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 17: ...17 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 19: ...19 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 20: ...20 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 24: ...6 HOW TO REPLACE THE HANDSET LCD 24 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 31: ...7 7 1 1 Registering a Handset 31 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 36: ... Test Burst Mode 36 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 84: ...22 2 IC801 Backside Terminal GND 84 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 85: ...22 3 IC851 Backside Terminal GND 85 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 92: ...27 2 KX TG5632M 92 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 93: ...27 3 KX TG5633B 93 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 94: ...27 4 KX TGA560M B 94 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 109: ...Memo 109 KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B ...
Страница 120: ...Memo KX TG5631S KX TG5632M KX TG5633B KX TGA560S KX TGA560M KX TGA560B 120 ...