I recently purchased a 2011 911 TTS. I was digging around in the passenger foot well to see if it had a DSC Sport already installed (planning on this mod). I found a telephone cable tucked up behind the carpet. It was coiled up and had one loose end...

Anybody know what this could be for???

 

Valentine One radar detector uses a phone type plug for power

 

All the radar detectors do actually. Probably had either a remote radar detector installed or had an auxiliary module from one, like Bluetooth module yo be able to use the V1 app on his phone.

 

That makes more sense than installing a land line. I'll have to check and see if he left any radar detector goodies hooked up.