Daisy Chained Fiber Explained

Author: Brian Rhodes, Published on Jul 26, 2013

Fiber is a mainstay for networking cameras run far apart. The number of cameras seldom matches the fiber available, and having two strands to run multiple cameras can be a showstopper. In this case, 'daisy chaining', or running multiple cameras in series is a common solution, but it can be a major headache when equipment breaks. In this note we look at fiber 'daisy chaining', discussed why it is used, and what options for improving reliability are available.

Definition

** ***** '****-**-****' **********, '***** ********' *** * ****** ****** ** ********* ******** * ******* of ******* ** ******. ***** ********** ********* ********** *** **** *** **** ******, ***** **** ****** ***** * '****' in *** *****, *** *** ****** **** *** ****** ******* down ***** ***** ******** ** *** ***********. 

*** ***** ********* *** ***** ******** ********:

**** *****, * ***** ** *** ** *** ***** ***** results ** ******** ******* ***** ***. ****** ****** ******** ******** using '****' ** '***** *********' ********, ***** ***** ***** ********** ** ****** ** * single ****. ******* * ****** **** ** ***** *** ************* handle **** ***** *** ********* ** ****** *****, **** ***** is ******** ******, *** *** ********** ****** ** '*** ****** fiber' ********* ** ******* ******** *******.

The ***** ******** *********

***** * ****** ***** **** *** ** **** ** ****** the *** ********* ** **** *******, **** ****** ***** *** own ********** **** *** *******. ******* ******* **** ***** ** costly ** ************* **********, ************ ****** ********* *** ********** ****** to *** ******** ******* ** * ****** **** ** *****. Additionally, *** ****** ****** **** *** ************ ******** *** ***** can ******* **** **** **** ** *********, **** *** * small ************ ******.

Ideal ** *********

******* ***** ***** *** **** ******** ** ****** ** ***** in ***** ** ***********. ****** * ************ '****' ****** ********  several ******** ** *****, **** *** **** ** **** ******, is *** **** ********** ********. ** *** ******* *****, *** others *** **********.  *******, **** ******** ** ************* **** ****** and ******** **** **** ***** **** * ******* ***. 

*************, ***** ****** ****** ******** ***** ******** ** ******* **** * ****** ****. However, ***** **** ******* *********, ** ******** ******** ****** *** fine ****** *********** **** **** ****** ****** *** ***** ** typical ******* **********. ****** *** '**** & ****' ****** ** ethernet *******, ***** ******* **** ** ****** ******** ** ***** interference **** **** ***** ** * *****, ** *********** ***** quality ******** ******. 

*** ***** ***** *********** **** $**,*** ** *****, *********, *** terminations *** * ~** ****** ****** *** ***** * ***** 'Star' ***** ******* ********:

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*** ***** ***** (********) ******* *** ***** ********* *** **** common ********:

*************, "***** ********" ******** **** * ****** **** ** *****. Using * ****** ******* *********** *** ***** ** ** ******** ********** *** **** ******** ****** ********. ********, ** ***** ****** ********, *** ***** connection ** ****** *** ******* **** * '***** *********', **** allows ** ** ****** ********* ********** (******) ******* ** *** a ******* (*****) *******.

********* ************** *** ***** **********, *** *** '********' *******, *** *** other *** '**********' ************. **** '***** ********', **** ********** **** depends ** *** ***** ****** ** *** ********; ** *** example *****, ** ******* * ** ******, **** *** ****** is ********. *******, ** ******* * **** ****, **** *******, and *** ***** ******* ** *** ***** *** ********.

'**** ********' ****** ***** ******* *** ******* ****** ******* **** daisy ******* *****, ******* *** '****** *******' ** **** ******* by *** ***** ********* **** *** *** **** ** ***** connecting **** - ********* ****** ** **** *******.

Improving ***********

*** ********* ** ***** ******** *** ** ********* **** * few ****** *********. ** ** ********** ***** **** *** ** run ** *** '****' **** ** *** *****, '******** ****', ** '***** ******** ****' *** ***** ** *********** *******. The ***** ***** ***** **** **********:

*** ********** ***** **** ***** * '****' ** *******. ********** '**** ***.** (***)'******* ** *** ****** ******* ** * ****** ** '****************' failover, ****** * **** ****.  **** ** '******* *' ***** in *** ***** ******, *** ****** ****** ***** *** * good ******** ********** ** *** *** ******.

Comments (6)

** *** ***** *** **** **** ******** ** *** ******** project *** ********* *******

** *** **** ******** **** **** ********* ** *****-******** *******. If ******** *** ************ ********, **'* **** ******** ** *** the ****** ***** (******* * ** *** ***** *******) **** to *** ****** ** * ******** *******. **** *** ** a ******* **** *** (******* * *** **** ********* *********** trench) ***** ** ** **** ** *************.

*** ******* ******* ** ***** **** ** **** ** * 6-strand. *** **** ********** ******* * *-****** ***** *** * 6-strand ** ****** ******* ** **** ** *** ******* **** (trenching, *******, *****). **** * *-******, ** *** ***'* **** a ******** ****** *******, *** *** ***** ****** *** *** ring *** **** * **** ** ***** **** ****.

** ********** **** **** **** ** ********, *** ******* *** question **** ** *****: **** *** **** ****** **** *** module ***** "*" **** **** ***** ********* ***** "*"? ** be ** *** **** ****, ** ******* *** **** ******** for ****, ** ***** ***** ** **** *** *** **** media ********** ********* ** * ****** **** ** *** **** switch (******* ** ** *** ******).

* ********* ***** **** *** ******* ** **** *** **** claims ** **. ***** * ************** ******* *** **** ********** (ROADM) ** ***** ** *** ****. *** ***** *** ** multimode ******. *** ***** ** *** ******* ** *** ****** and ********* *** ****** ****. *** -- ****** *** ****** to **** ***** ** *** *******, *** ***** **** *** colored ***** **** *** **** ** *** **** * **** mux ** *** *** ****. *** **** ** ***** *** a **** ****.

******** **** ****** ** ****** **** ************* ****** -- ******* in **** *******. * ****** **** *** ******* ** ******* cameras **** ****** *** *** * ****** ***** ********. ********* that ***** ** *** **** ****-********* *** ************ ********. ** you **** ** *** ***** ** *** ** *** ******* cameras, *** ****** *** ** ******** **** ** * ******* switch. *** *** *** *** **** ******* ****** ** *** would *** *****-******* -- **** *** ******** ***** ******** ** the *****. *** ********** ** *** ******* **** * ***** with ** **** ***** ** *****. *** ***** ** ** the *******.

**** *** *** ****** ** *** ***** **********?

** *** ***** **** **** *** ***** ** *** ****** (better **** *** ********** ******, ***** **** *** **************) ***** the **** ***/***** *********, **** *** ******** * ******* "****** topology", *** ** **** ** **** ***** ** ********* ****** in *** ***** ** *********** *** ** *** ********.

********* **** ** **** ****** ** ***** **** ******** "**** topology", **** ** ** ********* ******** ** ****.

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