2-Line Intercom-Cum-Telephone Line Changeover Circuit
|
560 |
8 Line Intercommunication using 89c51
|
598 |
A simple adapter to record a conversation with a telephone line
|
560 |
A simple device to test the phones
|
710 |
A simple indicator-busy line
|
707 |
A simple intercom
|
759 |
Access to the networks of satellite operators
|
805 |
Adaptation of imported phones
|
793 |
Adapter for AVA
|
1330 |
Against pirates telephone
|
823 |
Amateur radio FRE-92
|
1243 |
Amplifier to a telephone
|
829 |
Amplifier to the Spectrum of
|
826 |
Another option antenna for cell phone
|
824 |
Another phone amplifier
|
788 |
Another phone Guard
|
736 |
Answering machine announcing the time
|
624 |
Anti-ANI
|
944 |
Automatic recording of telephone conversation
|
687 |
Aviation Intercom
|
899 |