Openreach supply a modem at the time they install the FTTC connection. They also connect the BT Home Hub which should arrive a few days beforehand.
In most installations the modem has to be very close to the Master Socket
. A standard ADSL modem cable is used. The modem is not connected to an extension.
However the engineer can install a Data Extension Cable
he should have with him, to allow the modem to be up to 30metres from the master. Also, if the current extension wiring is CAT5 he will usually be happy to use that instead of the data extension cable, and make suitable adjustments to the rest of the setup. That seems to be discretionary, depending on his opinion of what he finds.
The Home Hub is connected to the modem using standard ethernet cable. A short one is supplied with it but you can replace that with any length you like, up to 100m.
I can't advise on Q2.
Q3 three similarly, except any WAP can be attached to the HH. It's just a question of which is best.
Q4 - just make sure you don't start playing the the modem for 48 hours after the day it is installed. (I'll check later perhaps, or someone will correct me, that may be 24 hours after the day). The reason being the DLM at the cabinet is particularly active during that period and can react to disconnections or re-syncs by banding the line at a lower speed than it can attain.
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