Got it sorted, rang the 24h emergency number and it took the guy about 30secs to try both lines

We have 2 SDSL lines at work, one isn't working but the ISP needs the phone number to sort it.
Now i know its one of two numbers and both ring when dialed. Rhe wall plug is just an RJ11 with a computer symbol on it, so i assume if i do find the correct lead a bog standard phone won't work![]()
Any ideas how to work out which is which?
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