Yes, you can
Call Forward All feature :d
You can create a dummy phone
or a translation pattern
Let say from your house you dial 408 902 9999
in CCM your recieve 9999 from your telco
then configure a Translation pattern 9999
and in called party transform mask 914982502752 for example where 14982502752
is the number you want to reach and 9 is the access code for PSTN calls
Tip: Check CSS and partitions