|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
257 |
|
8 Line Intercommunication using 89c51
|
272 |
|
A simple adapter to record a conversation with a telephone line
|
306 |
|
A simple device to test the phones
|
431 |
|
A simple indicator-busy line
|
435 |
|
A simple intercom
|
465 |
|
Access to the networks of satellite operators
|
484 |
|
Adaptation of imported phones
|
475 |
|
Adapter for AVA
|
606 |
|
Against pirates telephone
|
534 |
|
Amateur radio FRE-92
|
821 |
|
Amplifier to a telephone
|
504 |
|
Amplifier to the Spectrum of
|
536 |
|
Another option antenna for cell phone
|
463 |
|
Another phone amplifier
|
499 |
|
Another phone Guard
|
461 |
|
Answering machine announcing the time
|
379 |
|
Anti-ANI
|
507 |
|
Automatic recording of telephone conversation
|
422 |
|
Aviation Intercom
|
529 |
