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16

It all really depends on your requirements and current setup. That being said, here are some of the main ones. Active Pros: Active can fit a lot more wavelengths (colors) onto a single fiber pair. The pro being, the composite signal that is sent over a single fiber pair can carry more bandwidth than a passive of the same size could, in turn you don't ...


11

EDIT: Fixing answer now that I'm on a real laptop. Yes, OM3 is just "laser optimized" multimode, it will work with both your optic and distance. What are the limitations in terms of bandwidth/distance? Max Distance @ 1Gbit/s (per the product page): 550m This also lines up with the OM3 specification http://en.m.wikipedia.org/wiki/Multi-...


9

Can a single optical fiber support full-duplex communication? Yes. There are "BX" standards, e.g. 100BASE-BX, which use different wavelengths for send and receive. The transmit wavelength on one end needs to be the receive wavelength on the other end. For example, Cisco has these transceivers: 1000BASE-BX10-D and 1000BASE-BX10-U SFP for Single-Fiber ...


4

A full duplex or Bidirection communication meaning that it can support both stations transmitting and receiving simultaneously. To accomplish this, a single optical fiber with WDM technology is required for optical tommunication. WDM stands for wavelength division multiplex. This multiplex method uses both 1310 nm and 1550 nm wavelengths.Two devices are ...


4

does a bad equipment or a too high signal could break an optical fiber silica Not likely. To actually damage the fiber, you'd need very high transmit power (several Watt) not common with off-the-shelf transceivers. If you had that kind of equipment you wouldn't be asking that question. It's more likely that either the fiber installation has some problems (...


3

0/100M Single mode WDM 20Km Tx1550nm/Rx1310nm That's actually for the 100BASE-BX10 standard (-Downlink variant), boosted to 20 km. You can buy those SFP modules from some vendors. 100BASE-LX10 uses a pair of fibers, without WDM (or rather WDD). 100BASE-FX also uses a pair, but multi-mode fiber. A more common 1000BASE-BX10-D module likely won't work because ...


3

The optical signal is a binary stream. I assume you mean to diagnose the equivalent electrical signal. SFP transceivers are ignorant to the actual L1 protocol in use. Their main job is to convert an electrical signal (e.g. 1000BASE-X) to an optical signal (1000BASE-SX) and vice versa. You could use the TD+/- and RD+/- pins to extract the raw, differential ...


3

An optical cross-connect is a more general term for an optical switching device. The switching can be done electronically, purely optically, or mixed. An optical add-drop multiplexer is a more specific device for wavelength-division multiplexing (WDM) that can merge and split off specific wavelengths/colors. With a reconfigurable OADM that behavior can be ...


3

Here is an answer I found at the web site of a fiber optics manufacturer A common question we receive is whether a 50/50 beamsplitter can be used in reverse, to combine the signals from two sources, thereby combining their output powers. Unfortunately beamsplitters are reciprocal in nature, meaning that they perform the same ...


2

Stay on G655, and if you want to minimize the loss, switch the optics to 1550nm (You can use 1 DWDM frequency without splitter)... This is a good solution to make your fiber ready for a DWDM upgrade. Having a mixed 655/652 fiber is not a good idea, you will never know the exact dispersion of your fiber.


2

Another advantage of active DWDM vs passive is: dynamic provisioning (no need to go on-site to plug in the right optics) you can do L1 encryption


2

A big point in favour of active would be OTN (optical transport network) which gives advantages such as FEC (standard Reed Solomon FEC is the equivalent of 6dB gain, other implementations such as Nokia's EFEC2 go even further), performance management stats and additional channels in the overhead used for element management similar to SDH/SONET. This is ...


2

Second the postings of the other gents. I would avoid media converters for a single run fiber between devices. Another point of failure from the school of hard knocks. Most GigE to fiber converters are generally inexpensive devices that if they go offline on the fiber side can't report the link down unless it supports snmp polling or traps. Of all of the ...


2

Now that your question is a bit more clear, you con connect the switch to the router on one of the copper interfaces. Just configure the link between the router and the switch as a trunk link. If you need PPPoE on one of the VLANs, then set up PPPoE on the subinterface for that VLAN. Just don't run your internal VLANs out to the ISP. The drawing is a pretty ...


2

In addition to Ron's excellent answer: 1000BASE-SX runs on OM3 for up to 550 m officially - hope you're not exceeding that (too far). Also with the majority of switches, the SFP modules must be brand compatible with the switch - not necessarily sold by the original vendor but explicitly compatible with the original part. Check out the documentation. ...


2

GPON is a a collective term for various technology including 1G Ethernet variants (1000BASE-PX10, 1000BASE-PX20) or 10G-EPON 10GBASE-P(X). However, most Ethernet equipment isn't compatible with -P. First you need to find out what exactly it is you want to capture, then select/build the required device. We need to convert the GPON to Ethernet with optical ...


2

When we run the command 'show chassis hardware' , there is no such mentioning that its a NON-JNPR XFP. Based on this , can we say confidently that it must be XFP from Juniper side? The thing you're looking for isn't the absence of NON-JNPR necessarily, but the presence of a valid Part Number, i.e. 740-031832, which is valid. So, unless someone reprogrammed ...


2

What are the consequences of exceeding the SFP manufacturer maximum distance ? Very simple: anything between nothing over spurious data errors (effectively frame drops) to total link loss. The link will not come up at a lower speed - with rare exceptions (2.5/5/10 Gbit/s "smartrate" ports), Ethernet doesn't try to find the best, reliable speed. It ...


1

are "transponders" and "muxponders" terms that are exclusively bound with OTN? No, the terms themselves are not exclusive to OTN and can be applied to DWDM concepts as well. Obviously OTN and DWDM systems work differently and are quite complex. Traditionally, OTN systems are used to frame their signals into something that can be ...


1

Hopefully I'm understanding the question correctly. If you're asking if bad optics, or an optic shooting light thats too hot (high transmit dbm) can damage the core in the fiber cable itself; then no. Not under normal circumstances, anyway. The light would have to generate enough heat that the cable would be physically hot to the touch and I've never heard ...


1

The first thing to do when troubleshooting is to check the physical layer. That will include things like making sure that you have installed to polarity correctly. For example, the fiber at position A on one patch panel needs to be at position B on the patch panel on the other end. Your copper connections will probably automatically adjust the polarity when ...


1

It looks like it uses a normal SC/APC connector, so something like this should be working; WAN uses single mode almost exlusively, a green connector indicates Angled Physical Contact which is used with SMF only.


1

Single strand fiber transmission use a single strand of glass (optical fiber) to send data in both directions, namely bidirectional (BiDi) transmission. In recent years, the mainstream single strand fiber transmission technology is based on two wavelengths traveling in opposite directions (also called TW BiDi transmission). This technology is achieved via ...


1

Yes, if you have the right hardware. Normally a seperate strand of fiber is used for each direction. This keeps the transcievers simple and allows the same transcievers to be used for both ends of the connection. However you can now buy transcievers that allow full-duplex communication on a single fiber. These are known as "bidi" transcievers. They work by ...


1

Doped fiber amplifier (The typical representative: EDFA) Erbium-doped fiber amplifier (EDFA) is the most widely used fiber-optic amplifiers, mainly made of Erbium-doped fiber (EDF), pump light source, optical couplers, optical isolators, optical filters and other components. Among them, a trace impurity in the form of a trivalent erbium ion is inserted into ...


1

I think you'd be better off assuming these are not plastic/polymer since yellow = single mode = long haul = glass. See Plastic optical fiber the IEEE has not yet passed any of the proposals into a final extension of the existing ethernet standards.


1

If the manufacturer claims 300 mW power output, then why would you think the power rating is not reasonable? Unlike the mass market for UTP cables, where you see all kinds of crap sold, optical splitters have a very small, contained market, and getting a bad reputation in that marketplace will spell doom.


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You will need the part number to determine SFP compatibility. This is from Digital Optical Monitoring - DOM, which has a link to the compatibility matrix: DOM Support on Cisco Transeivers Not all transceivers support DOM, a list of capable transceivers is available at: DOM compability Matrix How to use DOM Following command can be ...


1

You may find that a pair of gigabit switches with SFP slots is, in fact, cheaper (or the same price, or nearly) as a pair of media converters. Media converters tend to be overpriced, as the majority of fiber installations don't use any, so they are relatively low-volume as compared to switches with SFP slots and copper ports. While the default logic has ...


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