When we buy new device such as Grandstream Networks GXW40XX we often through away most of the documentation but the warranty.
Very often issues with Grandstream Networks GXW40XX begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Network Router Grandstream Networks GXW40XX is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Network Router on our side using links below.