nanog mailing list archives
Re: Fiber cut in SF area
From: Ong Beng Hui <ongbh () ispworkshop com>
Date: Wed, 15 Apr 2009 11:33:05 +0800
The problem of been LoS is a big problem in metro as far as I know.You can't just put a pair of FSO gear without going to the building owner to talk about rights and cost. Not forgetting lighting protection and other stuff.
Murphy, Brian S CTR USAF ACC 83 NOS/Det 4 wrote:
I haven't seen any mention of the possible use of FSO (Free Space Optics) by the provider to restore some reasonable amount of connectivity during an outage due to a fiber cut. I would expect that having 2 or 3 pairs of FSO boxes to provide a "reduced failover capacity" in metro areas would be a reasonable measure to ensure service for extended physical (fiber break, cut, backhoe) outages - although not necessarily for power. Yes, it would take some time to roll them out and set them up, but less time than the crew working the splices, and the folks handling the FSO boxes should be different from the fiber splice truck roll crew. Note that a power outage would not allow microwave to be an effective remediation method either. Plus, FSO's use of lasers (vice microwaves) means no issues with spectrum (AFAIK). Granted, they have limited distance and require LoS, but using two or more pairs can probably handle the 80% situation in the metro (unless there is data to indicate otherwise). murph
Current thread:
- RE: Diversity - was: Fiber cut in SF area, (continued)
- RE: Diversity - was: Fiber cut in SF area Frank Bulk (Apr 14)
- RE: Fiber cut in SF area Gino Villarini (Apr 14)
- RE: Fiber cut in SF area Holmes,David A (Apr 14)
- Re: Fiber cut in SF area JC Dill (Apr 14)
- Re: Fiber cut in SF area Roy (Apr 14)
- Re: Fiber cut in SF area Tony Rall (Apr 14)
- RE: Fiber cut in SF area Gino Villarini (Apr 14)
- Re: Fiber cut in SF area JC Dill (Apr 14)
- Re: Fiber cut in SF area Mark Jackson (Apr 14)
- Re: Fiber cut in SF area JC Dill (Apr 14)
- Re: Fiber cut in SF area Murphy, Brian S CTR USAF ACC 83 NOS/Det 4 (Apr 14)
- Re: Fiber cut in SF area Ong Beng Hui (Apr 14)
- Re: Fiber cut in SF area Neil Harris (Apr 15)
- Re: Fiber cut in SF area Ong Beng Hui (Apr 14)