<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'><font face="arial, helvetica, sans-serif"><span style="font-size: 13.3333px;">https://www.cellmapper.net/map has crowd-sourced tower maps.</span></font><div><br><div style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 10pt;"><span name="x"></span><br style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px;"><br style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; 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font-family: Helvetica, Arial, sans-serif; font-size: 12pt; font-weight: normal; font-style: normal; text-decoration: none;"><b>From: </b>"Yosem Companys" <ycompanys@gmail.com><br><b>To: </b>nanog@nanog.org<br><b>Sent: </b>Sunday, January 13, 2019 5:29:27 PM<br><b>Subject: </b>Cable/Wireless-Tower Map for the San Francisco Bay Coastside?<br><br><div dir="ltr">Hey All,<div><br></div><div>Does anyone know whether there's a map that shows the cable/wireless-tower map for the San Francisco Bay Coastside (i.e., from Montara to Half Moon Bay)?</div><div><br></div><div>A few days ago, a truck hit a PG&E post on Highway 92, which traverses from San Mateo to Half Moon Bay. The accident caused the post to fall to the ground. </div><div><br></div><div>The Coastside has one Comcast-owned, fiber-optic cable that crosses the mountains from Silicon Valley to the Coastside. I guess the cable must run on PG&E posts because not only did the accident cause a blackout in some areas of the Coastside but also the entire Coastside was left without almost any Cable TV, Internet, or mobile phone connectivity for practically 24 hours.</div><div><br></div><div>I only have anecdotal evidence, but it seems that there was no Comcast or Verizon service whatsoever because Verizon leases the fiber-optic line from Comcast. It also seems that DirecTV and AT&T were not affected, and the theories vary as to why. Perhaps AT&T uses a combination of copper wire and wireless to service the area. DirecTV allegedly leases connectivity from AT&T.</div><div><br></div><div>I've also heard that Sprint PCS paid the owner of a building near the El Granada post office to use it to relay a mobile signal from there. But when I asked on Nextdoor about the incident no one mentioned Sprint. In prior discussions, Coastside residents say they avoid Sprint and AT&T due to their spotty service. And I know nothing about T-Mobile.</div><div><br></div><div>The reason I ask is because this is not the first time that Coastside residents have been left without mobile service, cable TV, and Internet connectivity. In fact, it seems to be a frequent phenomenon, making me wonder that if the infrastructure here is so fragile what would happen in the case of the "Big One" or, God forbid, a Tsunami or major storm surge. </div><div><br></div><div>I understand that there's a plan for emergency responders to maintain Internet and mobile connectivity that includes microwave connectivity, but I have yet to obtain the details. So I'm trying to get as much data as I can to help local decision-makers figure out how to make the Coastside more resilient before the next disaster strikes.</div><div><br></div><div>Thanks,</div><div>Yosem</div></div>
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