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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.

10
votes
2answers
431 views

Appropriate certificate to ask for a fibre installation (ANSI/TIA-568.3-D?)

I am getting a subcontracting company to provide terminated fibre connections between two points, and I want to say what they are expected to do and what certificate they are expected to supply. This ...
6
votes
6answers
1k views

Do I need to protect SFP ports and optics from dust/contaminants? If so, how?

I have a used switch with some SFP ports and some SFP modules installed, which I don't use. All new switches come with little rubbery bungs that block up unused SFP ports, but since this old procurve ...
0
votes
2answers
31 views

Purpose of fibre optic splitters?

What is the purpose of a fibre optic splitter? One easily finds purely optical devices which split a given fibre like this: X | +-+++-+ | | | | A B C D number of outputs from 2 ...
6
votes
8answers
3k views

What do the positive and negative (+/-) transmit and receive pins mean on Ethernet cables?

So I'm trying to understand the pin layout of an Ethernet port, specifically for 8P8C which to my understanding is the most common. Of the eight pins, only four are apparently used for communication, ...
1
vote
1answer
38 views

One Fiber Optic Line 24 Cores for Multiple Services Transmission

Hello we have a construction project for building a compound of 50+ villas. The aim is build and connect the villas all together transmitting all services through the fiber optic. The services ...
4
votes
1answer
126 views

Confused about single strand Fiber media converter or duplex media converter?

As per Title you may understand my question. I have read many articles about WDM technology as well as Tx/Rx on separate optical fiber. Here my question is which is better in real environment? Any ...
4
votes
2answers
165 views

Noticeable limitations or penalties from using inline fiber couplers

Is there any noticeable limitations or penalties from using inline fiber couplers, such as those in a patch panel to join multiple fiber runs together? Currently I have switches joined together ...
0
votes
1answer
127 views

Is a fiber optic connection considered a “wired” connection?

https://en.wikipedia.org/wiki/IEEE_802.3 As Wikipedia says, 802.3 is for ..."wired Ethernet". How can I name copper and fiber networks in one word to describe 802.3 standard and to distinguish from ...
1
vote
2answers
92 views

Fiber Optic Question about Single Mode cable with SC connection on SFPs

I have two places to connect. Let's call it, place A and place B. On place A there is a Fortigate100D which has this kind of port; On place B there is a Cisco SF200-48 10/100 Smart Switch; I have ...
0
votes
2answers
32 views

Optical fibers out of service

We just got multiple new optical fibers out of service on our infrastructure, does a bad equipment or a too high signal could break an optical fiber silica or could cause any others issues ?
1
vote
2answers
90 views

Can large ISPs really offer 1Gb “dedicated” service to every home and business?

Hopefully this is on topic for this site. While researching synchronous carrier service, so called EDIA or Ethernet Dedicated Internet Access, to a rural location in New Hampshire, USA, I came across ...
1
vote
1answer
37 views

ISP Failover On A Converged Network

We have our fiber providor as our primary ISP. We have comcast as our secondary ISP and our Voip providor. We can setup the failover between the two ISPs. We also have 19 voip phones that are on a ...
1
vote
1answer
78 views

How to use“ Multimode SFP GLC SX MMD” in Cisco Catalyst 2960 S connected LAN and single mode OFC network

We have single mode OFC network and CAT 6 CAT5 LAN with ethernet and gigabit Ethernet switches and ordered for "GE SFP, LC CONNECTOR LX/LH TRANSCEIVER FOR SINGLE MODE FIBER OF CISCO CATALYST 2960 S" ...
0
votes
2answers
53 views

Sharing GPON infrastructure between multiple service providers

Real life problem. A city's planning to install a GPON FTTH network. The city's only proposing to install the fiber, so the OLTs and ONTs will be owned by the service provider. The city would also ...
6
votes
1answer
408 views

Why is there a separate set of 10 Gigabit fiber-optic transmission standards for WANs/SONET?

So, I'm reviewing the different IEEE transmission standards for an exam, and I've noticed that for the 10GBASE-X standards, there's two different sets of fiber-optic standards, 10GBASE-xW and 10GBASE-...
3
votes
3answers
155 views

Will this SFP Transceiver run over OM1?

I'm fairly new to fiber cabling. I have an OM1 cable (running 750 metres) already installed on a site that currently works fine on an old system that is being upgraded. I'm trying to find out if these ...
3
votes
4answers
323 views

Will Mode Conditioning Patch Cables help with this issue?

I have been having problems with a link flapping only when working with the AXM763 Module, but when I change 1G module it works without problems. Also there other 2 links with the same configuration ...
1
vote
3answers
371 views

Can Ethernet use fiber optic cables?

I am new to networking, know about Ethernet and that Ethernet cables exist to make a wired networks. I also know about fiber optic cables which have a glass like material inside and transmit light ...
0
votes
2answers
61 views

What type of connector is this [closed]

I visit a flat and found this type of connector, the place, in theory, is capable of having fiber optic up to 1GB, I was expecting an OTN socket something like this: Instead, I found this:
0
votes
1answer
423 views

What is the maximum distance that a cable/fiber optic internet connection can operate without the internet quality degrading? [closed]

I hope that this is not an ignorant or misinformed question, I am new and I'm trying to learn more about internet provision. I have read that DSL has a maximum distance of 18,000ft (or 5.5 Km) before ...
2
votes
2answers
408 views

HP ProCurve 2524 - CLI Command to find Fiber Transceiver's Serial Number

Is there any cli command allowing to check the serial numbers of the inserted mini-GBIC modules on a HP J4813A ProCurve Switch 2524? The show interfaces transceiver [PORT-NUMBER] command which works ...
1
vote
1answer
151 views

Fiber signal loss - works on Cisco 4510 but not Catalyst 9300? [closed]

We are performing major switch upgrades and moving from a collapsed core design to a proper Core, Distribution, Access design. We have a very odd problem where our fiber connections going from the ...
1
vote
2answers
133 views

Fibre connection working in TX mode only?

I have this wierd problem: I need to connect two sites linked with a 4-couple multimode cable. At both end I installed HP Aruba 2530-8 switches with J4858D GBIC adapters. The situation I'm now ...
0
votes
1answer
61 views

How southern cross cable can transmit IP/ Ethernet signals keeping in mind the physical limitation of Ethernet cables?

The Optical fibre can transmit/receive any ethernet frames or packets faithfully for 5kms. However, the cables laid in the southern cross i.e. under the sea beds must be several miles long. The ...
1
vote
1answer
81 views

Can an Ethernet port with an SFP handle a PPP/fiber line?

AT&T put in a 150 Mbps fiber line at our business (not my home). They claim it uses the PPP protocol (I am told this is non-Ethernet), but is terminated in multi-mode fiber using 1000BASE SX (an ...
0
votes
1answer
48 views

Fiber optic cable juniper ex4500

Noob 10G question. I have a juniper ex4500 10G switch and Qlogic 3242 10G card. I use twinax cables for servers within the rack and they work just fine. But, now we added a new office which has 2 ...
4
votes
2answers
344 views

SC to LC converter - performance penalty?

I'm maintaining a cross connect and using a SC to LC adapter to patch the LC into my equipment. Was wondering if anyone has a clue on what's the penalty of using the converter in oppose to installing ...
1
vote
2answers
63 views

Transceiver for MM links up to 2k

I have 2 links of 1.5 mm f.o mm c / u I want to know if a transceiver GLC-GE-100FX would work for me, why and what are its variations.
6
votes
1answer
109 views

Do low temperatures cause problems installing new optical wiring or fixing broken optical cables by splicing?

One of our supplier reported big problems splicing (using this) a broken outdoor optical fiber cable when temperatures around or little bellow freezing point. They refuse to install new optical fiber ...
1
vote
2answers
295 views

Moving an Alcatel I-211M-L using Fiberoptic connection

I have an Alcatal I-211M-L that I'd like to move. Is it possible to buy fiberoptic couplers and cables to extend the range of the fiberoptic cable, or do I need to call Verizon to have them move it? ...
2
votes
3answers
179 views

Is SFP Transceiver on a Cisco switch must be a Cisco?

I just bought a SFP Transceiver (on Amazon) to connect an optical fiber between 2 CISCO switches (2960x). The SFP is detected as "Type : unknow". Do you know if I inevitably must buy a CISCO SFP ...
4
votes
2answers
60 views

Better throughput with 100 Mb NIC setting

Ran across something very odd today. Just had a symmetrical 100 Mb circuit installed at a site I’m contracting at. When the NIC is set for auto negotiate for duplex and speed, we only get ~96 Mb down ...
1
vote
2answers
427 views

25G SFP28 NIC and 25G SFP Adapter

My company recently purchased some Dell R740's with 2 Dual Port 25G SFP28 NIC's (Broadcom 57414) and wants to hook them up to an Arista 25G switch. We have two types of SFP adapters from Arista: SFP-...
1
vote
2answers
147 views

Acceptable Light Loss for SMF

I'm having some trouble finding a definite answer. I use a light loss tester to test our fiber (we dont have an otdr) and am unsure as to the acceptable light loss for 1310 SMF. So far I've figured ...
3
votes
4answers
2k 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 ...
1
vote
2answers
65 views

Cable for 4Gb Fibre Channel

I have two servers with 4Gb Fibre Channel HBA adapters. Looking for cable for them, I found reasonably priced cables that say they're 10Gb. I know that if this was copper, it would be overkill, but I ...
0
votes
2answers
48 views

How is wavelength assignment in Wavelength Division Muxing Rings determined? [closed]

I have this image that supposedly documents how to handle a 3-node wavelength division muxing ring: I know an n-node ring will need wavelengths (n * (n-1) / 2). But I have no idea how which ...
0
votes
1answer
67 views

Fiber Optic between two residential buildings [closed]

I'm not sure if this is the right forum, but thanks for your consdieration. Also, I apologize for the speculative nature of the question, I'm looking to extend internet to another building about ...
5
votes
2answers
944 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 ...
0
votes
1answer
719 views

Cisco router compatible with optical fiber [closed]

I have a 887VA Cisco router (just to let you know the kind of router I'm already familiar with, its size and capabilities...). Now, I need another Cisco router (resembling the 887VA) in which I can ...
6
votes
3answers
843 views

Cables on a closed rack

I've just spent the last few days building my first server rack. It will be a significant upgrade to our current mess. I was asked to buy and install one and so I did. I was not completely aware of ...
0
votes
1answer
47 views

Does a 1xN PON fiber splitter always “utilize” all N outputs?

If I'm using a 1x32 PLC fiber splitter, and attenuation is 15.05 dB, will the beam coming in always split 1x32 and each strand will have the same attenuation whether I'm using 1 of the 32 or all of ...
2
votes
3answers
145 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
3answers
121 views

Are there any advantages in using optic fiber to connect a host computer to an ethernet LAN?

I saw that computer Network Interface Cards (NICs) that use fiber ports (SFP) instead of RJ-45 ports and I wonder if there would be any significant advantage in connecting the computers directly ...
1
vote
2answers
166 views

Why OM2 fiber has more fiber loss than OM1?

Recently, I am doing some research about OM1 and OM2 fiber. According to the provided information, the OM2 fiber has more loss than OM1, but it doesn't point out the specific reason, just 1 sentence. ...
2
votes
2answers
381 views

Reasons not to combine daisy chaining with path redundancy

Is there any specific (maybe obvious) reason why path redundancy and daisy chaining is not combined? Cisco does show some network topologies HERE, but the combination of path redundancy and daisy ...
1
vote
3answers
136 views

Know the fibre model with an SFP with diagnostic

We're using our fibre links with 1G. We would like to move to 10G with this fiber but we have to know if it can support it. It has been installed 10 years ago and we can't find the model. Is there ...
1
vote
3answers
627 views

10baseT and 10baseFX difference

What is the difference between 10baseT and 10baseFx are those types of cables or the boxes that are used to plug the cables?
0
votes
2answers
851 views

How to DIY terminate Multimode Fiber? [closed]

I wired my house using a Honeywell Genesis series multimedia cable (part no. 5956) Among four other cables, it also has (2) 62.5um multimode fibers bundled together in a cable. (Those two 62.5/125 MMF ...
1
vote
1answer
231 views

Aerial fiber to replace underground fiber optic cable

I have aerial fiber optic cable only. Can I use this cable underground because I have excess aerial cable but I have no underground cable? In short, is aerial fiber optic cable insulated enough to be ...