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.

Filter by
Sorted by
Tagged with
1
vote
1answer
84 views

Single mode, single strand fiber handles 1Gbit but not 10Gbit

I have a strand of dark fiber between two buildings, with the run being roughly 1.5 miles/2.4km, and it is currently operating with 1Gb BX 10km optics, but when I try to put in 10Gb BX 10km optics, I ...
1
vote
2answers
67 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.
1
vote
3answers
182 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
1answer
312 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 ...
1
vote
1answer
54 views

Fiber Cable speed tester

How to select Fiber Cable (multi-mode or single mode). For example, if i need fiber backbone around 700 meters with 2 GB speed, how i choose, om 2, om 3 or OS 1 & Os 2. Is there any calculator or ...
1
vote
1answer
64 views

Force10 S4820T Fiber GBIC is not working

One of our clients bought two of these switches. Now, Dell sent a fiber splitter with a 40GB GBIC. See the pictures below: Now, I connect both GBICs and connect both splitters, one in each switch, ...
1
vote
2answers
625 views

RCV Err increases and port blinks amber

Sometimes gigabit port starts blinking amber light and when i do sh int count err i can see how "RCV err" growth. SW-Floor-2#show int gig 2/0/27 counters err Port Align-Err FCS-Err ...
1
vote
1answer
65 views

What is the purpose of defect limit in Zone D in criteria for MM‐PC Connectors (IEC 61300‐3‐35)

Zones in IEC 61300‐3‐35 are defined as shown on this picture. However the optical signal is transmitted by the Zone A - Core. Light is transmitted and retained in the “CORE” of the optical fiber ...
1
vote
2answers
103 views

Need an estimate of the max power density

Here is an image of a 1x64 fiber optic splitter/combiner: I am assuming these are plastic/polymer fibers. A very similar box (http://www.ebay.co.uk/itm/SC-UPC-1x32-Fiber-Optic-Splitter-PLC-Splitter-...
1
vote
2answers
77 views

Two different FS transceivers on point to point link

We have Cisco router with XFP-10GLR-OC192SR fiber transceivers and other end we have 10GBASE-SR SFP+ does that work to different capability. In short one side LR and other side SR fiber port does ...
1
vote
1answer
61 views

Active SC fiber connection not 'turning on' port

Multimode LC connected to Catalyst 2950. Other end of cable connected to Catalyst 2900 Series X 100baseFX connector. When the two switches connect via fiber there seems to be no communication. The ...
1
vote
1answer
29 views

Power Budget Based on Miniums?

I'm currently looking at 40Gbase-LR and am curious about the advertised power budget. Here are the specifications: Transmit max 2.30dBm Transmit min -7.00dBm Receive max 2.30dBm Receive ...
1
vote
1answer
95 views

About Optic Fiber Connection

I have a practical doubt. Can someone explain to me if i can connect 2 networks equipments using XFP and SFP+, MM the two, accross a SM fiber, ´cause i recently made the escenario and did not work. ...
1
vote
1answer
713 views

Splicing g. 655 with g. 652?

I have question regarding what type of cable shall I use in this situation to minimize the loss as much as possible. We have an old G.655 cable that is being used in the 1310 Wavelength and we want ...
1
vote
1answer
58 views

QSFP28 doesn't recognize 4x25G breakout cable and link with 4 SFP28s

So to preface, I'm not a network engineer but am somehow in charge of getting our juniper QFX5200-48y configured. The goal is to get our FS brand SPF28's and QSFP28's to talk to each other on the ...
1
vote
1answer
22 views

What causes a media converter to turn on the Link LED for 100BASE-FX

I'm working on a custom board with Texas Instruments DP83822 PHY and 100BASE-FX SFP transceiver. This is connected to a media converter via mmF fiber. The link led on the media converter never comes ...
1
vote
3answers
272 views

CRC errors in DC, ruled out L1 issues

I have a very strange problem with links in one datacenter and I'm looking for some other solutions I haven't looked for yet. We have a network based on Cisco Nexus 3K and most of the core links ...
1
vote
2answers
620 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 ...
1
vote
2answers
664 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? ...
1
vote
2answers
933 views

Data field and Payload Field in Fibre channel frame header

I came across this image of a FC frame header. I see that there are two fields, a 2112 byte data field and a 2048 byte payload field. I tried to read about how to distinguish among the two, but ended ...
1
vote
1answer
77 views

HP Access Switch 1920-48G POE switch

I would like to know whether we can use an HP 1920-48G POE access switch with an HP 5406zl as Core switch. The access switch will be connected through 1 Gbps SFP to the core switch.
1
vote
1answer
138 views

GPON intentional sabotage

All ONTs on a single GPON eventually share the same fiber core. It's light, so I anything entering the core travels both ways through PLCs, down to the ONTs and up to the OLC. If one would ...
1
vote
1answer
37 views

FO on what mode: Multimode or monomode for 290mts [closed]

in your experience what's better to recommed for a friend? Its to interconnect access level switches from two buildings. Possible to interconnect to a ring topology on a near future.
1
vote
1answer
37 views

NSA 2650 - traffic capped [closed]

I have an NSA 2650, firmware v 6.5.4.5-53n. Running only a few of the security services including content filter, gateway AV, IP, RBL filter, GEO-IP, and botnet filter (no DPI-SSL!). I'm trying to ...
1
vote
1answer
607 views

raisecom olt (ISCOM5508) default gateway

how can i config the default gateway and the mgmt ip address in this raisecom equipment? Product Name : ISCOM5508 Product Version : P300R003C000T000 ROAP Version : 1.3 System MAC Address:...
1
vote
1answer
200 views

Connect Cisco 3560x with LinkSys SRW2008 via Fiber

We have several buildings on campus. In our main building we have a core switch which is a Cisco 3560X (with a C3KX-NM-1G module installed) and a Cisco SR2024, among other switches. In another ...
1
vote
2answers
493 views

ISL vs ethernet trunking

What is the difference between ISL (inter switch link) on Fiber Channel and trunk links on Ethernet switching? Are they essentially the same thing?
0
votes
2answers
47 views

Connect 1GE SFP MM to 10GE SFP MM

I have a situation in which the ISP can only accommodate a 1GE SFP and single mode fibre, but we have bought 10GE SFP. Is it possible to get the physical link up when connecting a 1GE SFP to a 10GE ...
0
votes
2answers
74 views

how does fiber optics transmit digital data?

I'm new to networking, sorry if my question sounds dumb. Let's say we want to transmit a sequence of 10101010 via fiber optics. We see that fiber optics has a lot of tiny optical fibers as the picture ...
0
votes
2answers
578 views

SFP modules and LC-to-LC patch panels?

Simply put, we are joining two sites that are 200m apart using 8 core OM4 Multimode fibre cable. Am I correct in understanding that lc patch panels on either end of the fibre cable are ok and that ...
0
votes
2answers
157 views

understanding fiber optics layers architecture

I'm studying the history and technical details about fiber optics and I'm having trouble understanding which are the different layers that exist and have been used over fiber optics. For example, I ...
0
votes
2answers
40 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 ?
0
votes
2answers
2k 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 ...
0
votes
2answers
42 views

Robust Ethernet connection next to high power machines

We are creating a robot for facade treatment (cleaning, painting, drilling). I have few beginner level questions. An industrial robot with it's controller and our computer is placed at the top of a ...
0
votes
2answers
68 views

Fiber connection and Media converter

I am connecting 2 Ethernet Routers using Single mode fiber cable and Fiber/Ethernet Media converters Should i use 1 cord fiber or Duplex Patch Cord between the media converters ? whats the different ?...
0
votes
1answer
197 views

Copper or Glass for Low Latency?

I'd like to preface the main content of this post with the following: I understand this question may be equally suited to the Physics Stack Exchange, and so I have posted on there as well, but maybe a ...
0
votes
1answer
2k 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 ...
0
votes
1answer
77 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 ...
0
votes
1answer
119 views

Troubleshooting ethernet->fiber->ethernet with media converters

I'm trying to get the following setup to work: ethernet switch <---> media converter <---> fiber cable <---> media converter <---> ethernet switch The switches are identical tp-...
0
votes
1answer
30 views

Why does SONET need atomic clock but T-carrier does not?

SONET and T-carrier are both synchronous TDM. But T-carrier does not use atomic clock. Why does SONET? Is it because SONET does not use buffer? But how does it prevent bit loss if there is no ...
0
votes
2answers
286 views

Troubles wiring two network rooms with optical fiber and SFP-enabled switches

I'm in charge of the new network installation in the new office of my company, and I have troubles wiring two network rooms (one for servers and incoming internet and the other one for wiring closets) ...
0
votes
1answer
173 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 ...
0
votes
2answers
336 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 ...
0
votes
1answer
2k views

how to build a long distance wired network [closed]

My shop is 500 meters far from the outer gate, on a steep hill, and there is no straight path or line of sight between the 2 points. How would be the best way to extend the internet connection from ...
0
votes
1answer
55 views

Exceeding SFP manufacturer maximum distance

What are the consequences of exceeding the SFP manufacturer maximum distance ? Example from Cisco, Table 2. SFP+ port cabling specifications of https://www.cisco.com/c/en/us/products/collateral/...
0
votes
1answer
41 views

Really this happen ? Companies which uses HFC networks spent thousands of watts so that only a few watts reach customers ? (because atenuation )

I am very confused with understand how is possible to have a lot of losses in decibels. Let´s suppose we have two arbitrary point A and B. Transmition trhought these points are about optical-fiber. We ...
0
votes
1answer
306 views

Connecting two Stacked Aruba 2930M Switch with third one using LACP

In the skit, I would like to connect the two Stacked switches with a third one using the SFPs+ Modules and therefore I need to configure the LACP for them. How can I configure the LACP on both the ...
0
votes
1answer
25 views

Transmission delay of multi-lane vs single-lane Ethenet

Suppose there are two devices that can transmit with same throughput (e.g., 10Gb/s). Suppose that one device is connected via single-lane cable while the other with multi-lanes (e.g., 8 lanes). Will ...
0
votes
1answer
42 views

Is SONET a physical layer or a data link layer?

According to some sources, SONET is physical layer. But some sources say that SONET can carry IP directly. Also, SONET defines its own frame -- it has a header and a payload. That must make SONET a ...
0
votes
1answer
21 views

Multiple Bridges in a single device acting as media adapters

First, the back story. We're doing an addition on a building that is about to disrupt an existing old OM1 fiber run. We are using three pairs from this run: 1 going into the building under renovation, ...