Home Projects Telephone related  

--== Telephone related ==--
 

Name Choose language PCB
         
1

 

Phone line indicator  
2   Phone "Hold" With Music -
3   Soft Musical Telephone Ringer -
4   Telephone amplifier -
5   Telephone line monitor -
6   Cut Phone Line Detector -
7   FM Telephone Bug -
8   Phone Busy Indicator -
9   Ringing Phone Light Flasher -
10   Simple Phone Tap -
11   Telephone Hold Button -
12   Telephone line monitor -
13   The Link Telephone Intercom -
14   The Link A2B+1 (the Link Telephone Intercom - DTMF version) -
15   The Link 4+0 Internal Intercom -
16   The Original 2 Phone Link Design -
17   8 Line Intercommunication using 89c51 -
18   The Link "P" - Privacy Link! (Telephone Intercom) -
19   Two way Simple Very Small Telephone Exchange -

 

 
 

 

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