I have a modem DPQ3212.Downstream led is in amber.Link led is in amber, flashing.My ISP tell me all is OK, but my internet is slow.I need all leds in green.Only one downstream channel is open.Please, help me and excuse my poor english.

I have a modem DPQ3212.The led DS is amber.The led Links is amber, but flashing.Only one downstream channel is open.My ISP tell me all is OK, but my internet is slow.Please, help me.I need all the leds in green.And excuse my poor english.