"drop and insert multiplexing"

Unanswered Question
Sep 3rd, 2007

Hi all,

I'm writing the GW/GK exam tomorrow morning and was just reviewing the exam objectives on Cisco's site. I think I've covered most of them off in reading the cisco press book for GW/GK a ridiculous number of times ... sigh

One notable exception is:

"Describe the appropriate implementation of drop and insert multiplexing"

I'm not sure what they are referring too since I've never come across the term in my ref material and I'm having some trouble digging up any info on Cisco's site.

Can anyone give me a quick summary overview of what this is about?

TIA

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scottmac Mon, 09/03/2007 - 19:01

Drop & Insert in multiplexing is a node where signal can be taken off and / or added to the primary paths.

In WDM/DWDM, an OADM (Optical Add / Drop Mux) would be a "Drop & Insert" node.

In just plain ol' CSU/DSUs Drop & Insert CSU/DSUs are used to peel off a couple channels or split a T1 to multiple devices (Like X number of chnnels to the PBX, X number of channels to the router.

Good Luck on your test.

Scott

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