The new Sky+ box will need to be connected to the phoneline.
The existing Sky box will still need to be connected to the phoneline - although you're well out of the 12 month IDC (Interactive Discount Contract), any box used for Multiroom must still be connected to a phoneline AFAIK.
You will need a microfilter for every single phone socket which is in use. The ADSL modem, the cordless phone, the Sky+ box, the normal Sky box... all must be connected to a microfilter.
Yes, it can affect your ADSL when sharing the wiring with so many other things.
Have you thought about getting a filtered faceplate for your master socket?
Filtered faceplates are used to replace the normal faceplate on a BT NTE5 Master. They have the microfilter built-in, & give you two sockets on the front instead of one - a socket for the phone (like normal, but filtered), but also an RJ11 ADSL socket (unfiltered). They also filter the extension connections on the back (so any hardwired extensions would become filtered at the source). You can get modified filtered faceplates (such as
this one from
Clarity), which have an extra bit on the IDC connector at the back, giving the option to run a hardwired unfiltered extension (for ADSL) from the back, as well as a filtered phone extension. Using a filtered faceplate, & having the router connected to the ADSL socket (or unfiltered rear connectors), is the best way to connect.
They'd need to run new cable for both boxes. The Sky+ box will require two feeds from the LNB on the dish, requiring two cables (although I've read sometimes they use a single multicore cable?), while the existing box would need a cable run from the LNB to its new location.
Multiroom gives you an exact copy of your sub on another box, for £10/month.
If you have at least 2 Premium channels, then you don't pay the £10/month Sky+ fee.
So if you pay £99 for the Sky+ box & £10/month multiroom, you'll get all your channels on both boxes & get the Sky+ service for free.
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http://www.sky.com/portal/site/skyco...entid=10836203
Various snippets...