To extend the sat cables you should have
(1) sufficent length of CT100 cable
(2) 4 F connectors
(3) 2 in-line F connector couplers.
Fit the F connectors to the two extensions and make sure there are no short circuits between the inner and the outer screen. then use the couplers to connect to the orignal cable and all should be well.
To extend the telephone cable a standard telephone extension cable will do fine
To make off the f connectors follow this guide.
How to fit F Connectors to coaxial cable
Thanks to Brian & Sam