Questions tagged [fiber]

Fiber optic data transmission, cabling, connectors, interfaces. Questions should have this tag if they directly involve fiber optic transmission of data, fiber optic cabling and/or connectors, or interface devices directly attached to fiber optic cable.

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8
votes
4answers
21k views

The maximum length of CAT6 for intranet network?

Recently I purchased CAT6 cable with a length of 150 meter. I bought another CAT6 with a length of 148 meter. I joined both the cables using RJ45 cable coupler. I tested it using LAN TESTER, and ...
8
votes
6answers
21k views

Can a single optical fiber support full-duplex communication?

Can a single-mode single optical fiber support full-duplex communication, or does it have to be two fibers, one for each direction?
20
votes
5answers
12k views

Speed of Light in Copper VS Fiber - Why is Fiber Better?

I'm reading Computer Networks - A Systems Approach 5th ed., and I came across the following statistics for the speed of light through different mediums: Copper – 2.3 × 108 m/s Fiber – 2.0 × 108 m/s ...
8
votes
2answers
2k views

Cisco Nexus Fabric Extenders with 10G-SFP in path?

We are looking to deploy a new data center build-out with Nexus 7ks and Nexus 2ks(FEX). I know the Nexus 2ks come bundled with the Fabric Extenders to be used to uplink to the Nexus 7ks. Our plan ...
7
votes
3answers
1k views

Fiber between two sites - no signal lights

We need to have fiber connection between two sites (distance less than 300 meters from each other). Currently there is multi-mode fiber connected to old switches working nicely. Now we are updating ...
7
votes
9answers
27k views

Is fiber optic Digital or analog? optical signal is digital or analog?

Is fiber optic Digital or analog? optical signal is digital or analog? what kind of signal Fiber generate? I mean traditional phone system is analog, but Ethernet is digital, but what about Fiber ...
7
votes
2answers
595 views

What certifications are there for Fiber Optic termination and splicing?

As a knowledgeable person in computer networks I have always had an itch for learning how to create custom-length fiber optic cables. So, as a personal goal, I want to get trained and certified in ...
5
votes
2answers
2k views

Speed benefits when switching from 1Gb copper LAN to Fiber Optic

We are trying calculate how will the network performance improve when we switch from 1Gb copper LAN to Fiber Optic. We have 5-20 people simultaneously working on a Server via the 1Gb LAN. There are ...
3
votes
4answers
4k views

1000BASE-LX/LH Receive power level greater than transmit power level

I have a pair of GLC-LH-SMD devices which are 1000BASE-LX/LH In the field they will be a couple of kilometers apart , but whilst I test the setup I only have 5m patch leads. I looked at the specs ...
2
votes
3answers
199 views

How data is routed from one landing point to another on submarine cables?

On submarine optical cables with one trunk and several landing points, how does data that leaves one landing point be routed to a desired destination at another landing point? I have many hypotheses: -...
1
vote
2answers
2k views

Does a SFP port indicator goes on when receiving or transmitting or both

My questions are on the bottom, feel free to skip my debugging story if you're in a hurry. Story I started to check a network spanning tree status. All switches are connected on fiber, through SFP ...