|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
213 |
|
8 Line Intercommunication using 89c51
|
208 |
|
A simple adapter to record a conversation with a telephone line
|
271 |
|
A simple device to test the phones
|
395 |
|
A simple indicator-busy line
|
343 |
|
A simple intercom
|
407 |
|
Access to the networks of satellite operators
|
395 |
|
Adaptation of imported phones
|
411 |
|
Adapter for AVA
|
487 |
|
Against pirates telephone
|
467 |
|
Amateur radio FRE-92
|
676 |
|
Amplifier to a telephone
|
426 |
|
Amplifier to the Spectrum of
|
475 |
|
Another option antenna for cell phone
|
399 |
|
Another phone amplifier
|
391 |
|
Another phone Guard
|
396 |
|
Answering machine announcing the time
|
348 |
|
Anti-ANI
|
437 |
|
Automatic recording of telephone conversation
|
382 |
|
Aviation Intercom
|
424 |
