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Networking Phones Together in Building

I have a number siemens optipoint 500 economy phones. They have been used in an office environment in which the networking of the phones were managed by a third party. I would now like to use them in ...
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1answer
61 views

Where should I connect a second slave phone box?

Hi I'm new to doing diy jobs, but I already wired up a slave phone line to the master box. I'm now looking to wire a 3rd box up, would I wire this off the slave box or the master ?