/Schematics/Telephone circuits

Title Short description Rate Download
Telephone line guardian v1 Turns alarm on if phone line is in use. 2.91 993
Telephone line guardian v2 Turns on alarm if phone line is in use. 2.92 812
Telephone line recorder v1 A device that turns-on voice recorder automatically and taps to the phone line. 2.90 3,344
Telephone line recorder v2 A device that turns-on voice recorder automatically and taps to the phone line. 2.88 2,370
Telephone line recorder v3 A device that turns on voice recorder automatically and records phone conversation. 2.88 1,665
Telephone line recorder v4 A device that turns-on voice recorder automatically and taps to the phone line. 2.93 1,904
Telephone line status Another device for telephone line status indication. 2.92 1,197
Telephone metering signal counter Counts 16kHz signals on phone line. 2.89 2,961
Telephone ring counter Telephone ring counter device. 2.87 1,803
Telephone ringer Audio and visual telephone ringer. 2.90 1,494
UPS for cordless phones Backup power supply for cordless phones base station. 2.92 1,698

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