Hi can anyone tell me if this is good or bad?

                             Down        up
DSL Noise Margin: 9.9 dB 10.1 dB
DSL Attenuation: 44.5 dB 28.1 dB

I am approx 2.2km from the exchange.No rim.My modem tell me I am getting 6Mbs.I used to get (slightly) more.7-8 usually.However these days it is dropping out more (last week 2.8!!  and while wireless on modem does not drop out too much the ipad and iphones have a hard time satying connected.Mostly this is the ipad.Laptop is not too bad. 

WAG160n Linksys.I already know this is a crap router but am wondering what I can do to make this better

thankyou

Dave