|
2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
602 |
|
8 Line Intercommunication using 89c51
|
641 |
|
A simple adapter to record a conversation with a telephone line
|
597 |
|
A simple device to test the phones
|
758 |
|
A simple indicator-busy line
|
739 |
|
A simple intercom
|
799 |
|
Access to the networks of satellite operators
|
850 |
|
Adaptation of imported phones
|
824 |
|
Adapter for AVA
|
1372 |
|
Against pirates telephone
|
859 |
|
Amateur radio FRE-92
|
1284 |
|
Amplifier to a telephone
|
868 |
|
Amplifier to the Spectrum of
|
856 |
|
Another option antenna for cell phone
|
859 |
|
Another phone amplifier
|
822 |
|
Another phone Guard
|
771 |
|
Answering machine announcing the time
|
655 |
|
Anti-ANI
|
1008 |
|
Automatic recording of telephone conversation
|
726 |
|
Aviation Intercom
|
943 |
