|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
302 |
|
8 Line Intercommunication using 89c51
|
362 |
|
A simple adapter to record a conversation with a telephone line
|
356 |
|
A simple device to test the phones
|
476 |
|
A simple indicator-busy line
|
501 |
|
A simple intercom
|
506 |
|
Access to the networks of satellite operators
|
565 |
|
Adaptation of imported phones
|
562 |
|
Adapter for AVA
|
742 |
|
Against pirates telephone
|
571 |
|
Amateur radio FRE-92
|
941 |
|
Amplifier to a telephone
|
593 |
|
Amplifier to the Spectrum of
|
607 |
|
Another option antenna for cell phone
|
540 |
|
Another phone amplifier
|
575 |
|
Another phone Guard
|
532 |
|
Answering machine announcing the time
|
428 |
|
Anti-ANI
|
580 |
|
Automatic recording of telephone conversation
|
458 |
|
Aviation Intercom
|
610 |
