Three variants of homemade Anti-AON. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Telephony
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The article provides diagrams and descriptions of several variants of self-made Anti-AON.
Option 1
The system is based on the SN7440 series logic kit. The basis is a master oscillator tuned to a frequency of 12.626262 Hz. The operation of the system is based on the impact on the information receiving path of caller ID systems, bypassing the blocking of the caller's voice path and the impossibility of transmitting any digital or analog signals through it for the time of transmitting information about his number. This is done by closing the line with a frequency of 12.626262 Hz.
(click to enlarge)
Chips DD1, DD2 - 7440 (replacement K133LA6 is possible), transistor VT1 KT315G, resistors R1-2.2kOhm, R2-1kOhm, capacitor C1-220mF * 10V, relay RES-64A
Option 2
This circuit can work without an external power supply. Relay K1-RES10, capacitor C1 determines the frequency of operation of the relay (frequency of AntiAON pulses), its value is about 47mF.
Option 3
This circuit is a multivibrator assembled on transistors VT1 and VT2 - KT361G, resistors R1 - 200 Ohm, R2 - 20 kOhm R3 - 6.8 kOhm, capacitors C1, C2 - 47mF, relay K1 - RES64A.
Publication: cxem.net
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