<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif"><a href="https://corporate.comcast.com/press/releases/comcast-first-isp-hollow-core-fiber-faster-speed-lower-latency">https://corporate.comcast.com/press/releases/comcast-first-isp-hollow-core-fiber-faster-speed-lower-latency</a><br></div><div class="gmail_default" style="font-family:georgia,serif">They have a 40 km cable near Phily, and it can transmit in both directions simultaneously.  The article says they are getting ready for 10G.</div></div>