- AUDIO +
AUDIO -
MIC +
MIC -
OFF Hook
Ground
I presume that the Digital UA Link on pins 3 and 4 of the RJ12 connector is a serial signal used to send this (and likely other data) out of the phone.
Is there a device I can purchase that simply decodes this and gives me an OFF-HOOK condition?
Or...
Does someone have a method to decode this signal?
- A circuit?
Arduino code?
A device?
Protocol Datasheet?
Anyone ? Anyone?
Thanks,
Jerry