Now on sale there phones and consoles with caller ID for every taste. However some users do not meet current design. It comes the owners of cordless telephones and the subscribers of the PBX. Given this, the firm "TeleSystems developed attachment, which on a telephone line voice status reports the caller's number.
The console include gap in the telephone line. When triggered, the system caller ID the caller is given a ringback call and exit consoles - voice message on the caller's number. This message may be heard when going off-hook on any of the phones connected after the consoles. Thus, from any telephone devices (cordless telephone, regular phone, Fax, etc.) connected after the consoles, you can get information the number of the caller.
Users of the phone will be convenient to get the information out there. where they are with a pipe. When working with PBX it is necessary for each city line to install the console. As a result any extension user will be able to get information on the number of the caller. The use of conventional caller ID in internal phones gives the desired result, as in most cases unable to negotiate a job PBX and phone with caller ID.
(click to enlarge)
When an incoming call after lifting the handset (in the mode of auto-pick the line occurs automatically after the specified number of calls) on any phone or the radio console reports the number of the caller. If you have the desire with to him, I press the button on the phone and when not - just to hang up. During the message number of the calling subscriber hears the ringback (long beeps).
The console has an internal non-volatile memory 100 calls, where remember the number of the caller, date and time. Management from the keyboard of the phone.
Diagram of the device shown in the figure. The basis of the device - RS-con-troller Microchip PIC16C73. Quartz resonator ZQ2 forms the main clock the frequency and the signal frequency of 32 768 Hz (settable ZQ1) counts time and periodically Wake the controller from "sleeping" state. Voice messages are stored in the ROM DD3. Driver the ROM addresses collected two shift registers (DD4. DD5). Chip non-volatile flash memory DD2 this is used to store information in memory ringing.
Transistor VT1 is implemented shaper of the request signal and the control signal call (SND). The signal from the telephone line for the analysis of the parcel caller ID is supplied to the ADC controller (signal SIG). The ADC has achieved the high probability of identification. The sensor is assembled on call the resistors R13. R14. a condition sensor line - R7, R8.
The key K2 is opened when the auto-pick (UP signal). The capacitor C5 is used to prevent the passage of the voice message to the caller (in this case the switch SW1 is opened by the signal CUP). Through the transistor VT3 in line arrives beep (LSD) of the voice message of the caller's number (applied pulse width modulation).
Powered console from the telephone line through a resistor R4 and a buffer power source (GB1) voltage 4.5 V (three AA batteries). She collected compact case size 100x60x35 mm.
Program firmware RS-kontrolera.
Authors: A. Glazkov, I. Kite, Zelenograd