I get this install in place of my mot sb5101 ; my isp be Comcast . after test it appear that the -lrb- ... -rrb- yield different result on download from 6mz to 16mz depend on time of day . dsl report test give about a 40 % speed increase . so , it do appear offer superior speed to the sb5101 . also , the error rate on packet reception be significantly lower .