When you purchase an EFM connection from Gradwell you have the option of either a two pair or four pair service.
Currently there is no way to upgrade or downgrade from this (for example, upgrade from a two pair service to a four pair service), and if this is required we will need to cease and reprovide your connection. This is always subject to exchange capacity, as this may have changed in the time the order was placed to the time you wish upgrade.
The reason for this is when your connection is set up in the exchange the copper pairs (that your service is provided along) need to sit next to each other so that they can be bonded. The next circuit that is installed in the exchange them take up the next free slot in our equipment. It is not economically viable for us to leave spare capacity next to your connection in case you may want to upgrade in the future.