|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
385 |
|
8 Line Intercommunication using 89c51
|
448 |
|
A simple adapter to record a conversation with a telephone line
|
426 |
|
A simple device to test the phones
|
572 |
|
A simple indicator-busy line
|
583 |
|
A simple intercom
|
604 |
|
Access to the networks of satellite operators
|
646 |
|
Adaptation of imported phones
|
654 |
|
Adapter for AVA
|
1186 |
|
Against pirates telephone
|
661 |
|
Amateur radio FRE-92
|
1068 |
|
Amplifier to a telephone
|
683 |
|
Amplifier to the Spectrum of
|
696 |
|
Another option antenna for cell phone
|
682 |
|
Another phone amplifier
|
662 |
|
Another phone Guard
|
614 |
|
Answering machine announcing the time
|
497 |
|
Anti-ANI
|
674 |
|
Automatic recording of telephone conversation
|
523 |
|
Aviation Intercom
|
725 |
