How i will configure my adsl modem?

Previously I was using plug n play Internet modem but speed was not fast. So I signed up for a new connection where I needed ADSL modem. So I bought ADSL modem from the market and I have to configure it. If I want to configure from the Internet company then I need to pay them extra.
My modem is Huawei SmartAX MT882a. Can anyone please help me configure it and install it and then I can use fast Internet. Its a cable modem not wireless.
