|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
239 |
|
8 Line Intercommunication using 89c51
|
235 |
|
A simple adapter to record a conversation with a telephone line
|
288 |
|
A simple device to test the phones
|
417 |
|
A simple indicator-busy line
|
396 |
|
A simple intercom
|
447 |
|
Access to the networks of satellite operators
|
433 |
|
Adaptation of imported phones
|
450 |
|
Adapter for AVA
|
543 |
|
Against pirates telephone
|
508 |
|
Amateur radio FRE-92
|
757 |
|
Amplifier to a telephone
|
475 |
|
Amplifier to the Spectrum of
|
513 |
|
Another option antenna for cell phone
|
425 |
|
Another phone amplifier
|
439 |
|
Another phone Guard
|
423 |
|
Answering machine announcing the time
|
363 |
|
Anti-ANI
|
480 |
|
Automatic recording of telephone conversation
|
404 |
|
Aviation Intercom
|
492 |
