Connecting raspberry pi to phone line

[drgeoff]

https://www.theregister.co.uk/2019/09/2 ... witch_off/ may be of interest.

[bomblord]

Many phone lines use Cat 5 cables and just exclude the unused wires and I have seen phone lines running into ethernet jacks on a punch panel for VOIP it won't fry anything. I'm not saying he wire the GPIO pins into a phone line.

VOIP uses Ethernet, not phone lines.

Structured wiring is often used to carry phone signals. often with an adaptor each end between RJ11 and RJ45.

Exactly, thank you that's what I was trying to get at.

[Andyroo]

The Exchanges are the main cause of DSL failures locally - the DSlam cards often glitch, so much so we have had a monitor on the rack I’m connected to to reset some cards automatically. The old POTs lines fail in village cabinet now and them but over the last few years most of the connections have been replaced and the fibre between the cabinet and the exchange in the next village is reasonably new.

Oh for FTTPbut then again it took our MPs involvement to get broadband

You used to be able to find what rack and card you where on - handy when the OpenReach folk could check the other users to see if it was the card or not. Last year both a friend and I had exactly the same issue at the same time, I’m with EE and he was with Sky. Two engineers where sent (we live at opposite ends of the village) and ended up looking at the same card in the exchange. They still did not replace it

[ef86]

A POTS line is 48 volts so as has been said direct connection is not advisable the reason for 48 volts serial modem would be the best option advantages of this is you can get the SS7 signaling data "caller ID" which comes in the form of chirps prior to the bell ring which you can hear if using an engineers handset.