ADSL2+ running 16Mbps by Dane Jasper on February 3, 2008 • 4 Comments This loop is a bit over one mile long (~5500ft). Downstream sync is 16Mbps, upstream sync at 1.1Mbps. This is served out of the Santa Rosa 01 (downtown) central office, from our new DSLAM deployment there. Click for larger, more legible image.