Funny you should mention test certificates. I have them for the Ethernet, satellite and aerial coax.
In addition to the six Ethernet ports, they installed a satellite dish with an 8-way LNB pre-cabled to points around the house. We use it for Sky in the lounge and Freesat in the other rooms (our LG TVs have it built-in).
Sounds like I was lucky to have a builder that did it properly; by engaging a local comms specialist. None of this was charged; all as standard.
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DougM