Because of TCNZ system constraints, in order to move to naked DSL and port your number.
For the time being, Customers will need to call their current line provider and “custom link” their number to a "dummy" Telecom number which still operate on the existing line.
Then we will do the Fusion activation and request that the number be ported to WxC. Their other services should drop away and the customer gets to keep their number.
We are working with TCNZ to get the Customer Link fee waived until they can get their systems working transparently but cannot make any guarentees just yet.
The Sales folks will walk you through the necessary steps when you talk to them if this is all too confusing for you.... as it is for me.