|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
272 |
|
8 Line Intercommunication using 89c51
|
312 |
|
A simple adapter to record a conversation with a telephone line
|
328 |
|
A simple device to test the phones
|
447 |
|
A simple indicator-busy line
|
463 |
|
A simple intercom
|
480 |
|
Access to the networks of satellite operators
|
523 |
|
Adaptation of imported phones
|
508 |
|
Adapter for AVA
|
645 |
|
Against pirates telephone
|
548 |
|
Amateur radio FRE-92
|
880 |
|
Amplifier to a telephone
|
546 |
|
Amplifier to the Spectrum of
|
566 |
|
Another option antenna for cell phone
|
489 |
|
Another phone amplifier
|
534 |
|
Another phone Guard
|
491 |
|
Answering machine announcing the time
|
399 |
|
Anti-ANI
|
536 |
|
Automatic recording of telephone conversation
|
434 |
|
Aviation Intercom
|
562 |
