SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : Global Crossing - GX (formerly GBLX)
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: barry fowler who wrote (3115)11/6/1999 2:03:00 AM
From: D. Newberry  Read Replies (1) of 15615
 
Hi Barry,

I did mean self healing. Sonet ring architecture is usually, but not necessarily, set up using a counter rotating ring architecture (It can also be set up point to point to save bandwidth, but you then lose the self healing capability). In this way the data literally flows in different directions on the ring to the terminating end. The terminating mux receives the data off one path. If that path fails, it switches to the alternate path within 50msec, thus "self healing". (The two muxs adjacent to the break actually do a ring wrap to maintain the ring topology, but that is difficult to describe without a white board in front of me).

You are also correct about fault isolation. Test equipment can be place at the terminating ends that will tell you where the break occurred. I am not altogether familiar with this test gear, since I don't actually repair cable, but my techs say that is how they isolate breaks (I suspect they often simply go outside and see where the backhoe is).

Regards,

DN
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News