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king0demons t1_iqrj6ni wrote

Will this properly power phones with high power ringers? A large portion of older phones can not ring using modern landline voltages as the older land line systems ran high voltage inorder to survive long distance transmission.

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p8pes OP t1_iqs5qo3 wrote

Cool question! I have no idea about that. I think if you converted the older phone to an RJ11 connector it might work. (RJ11 is a standard phone port, the older phones have more of a cable box inside of them, though there are numerous videos on the web showing how to make an RJ11 conversion fairly easily) The bluetooth adaptor here (Cell2Jack) pulls 5V from a USB connection and powers the phone through the RJ11 port.

In theory the phone would draw whatever power it needs from that connection. I think the older phones suffered more from a brickwall of the phone utility itself on how much voltage they would allow on individual connections but maybe here it's just an open hose on how much is needed. Certainly worth the $30 to just test it out at least.

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