Los Angeles Single Mode VS Multi-Mode Fiber Cabling

Single Mode cable is a single stand (most applications use 2 fibers) of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission. Single Mode Fiber with a relatively narrow diameter, through which only one mode will propagate typically 1310 or 1550nm. Carries higher bandwidth than multimode fiber, but requires a light source with a narrow spectral width. Synonyms mono-mode optical fiber, single-mode fiber, single-mode optical waveguide, uni-mode fiber.

Single Modem fiber is used in many applications where data is sent at multi-frequency (WDM Wave-Division-Multiplexing) so only one cable is needed - (single-mode on one single fiber) Single-mode fiber gives you a higher transmission rate and up to 50 times more distance than multimode, but it also costs more. Single-mode fiber has a much smaller core than multimode. The small core and single light-wave virtually eliminate any distortion that could result from overlapping light pulses, providing the least signal attenuation and the highest transmission speeds of any fiber cable type.

Single-mode optical fiber is an optical fiber in which only the lowest order bound mode can propagate at the wavelength of interest typically 1300 to 1320nm.

Multi-Mode cable has a little bit bigger diameter, with a common diameters in the 50-to-100 micron range for the light carry component (in the US the most common size is 62.5um). Most applications in which Multi-mode fiber is used, 2 fibers are used (WDM is not normally used on multi-mode fiber). POF is a newer plastic-based cable which promises performance similar to glass cable on very short runs, but at a lower cost.

Multimode fiber gives you high bandwidth at high speeds (10 to 100MBS - Gigabit to 275m to 2km) over medium distances. Light waves are dispersed into numerous paths, or modes, as they travel through the cable's core typically 850 or 1300nm. Typical multimode fiber core diameters are 50, 62.5, and 100 micrometers. However, in long cable runs (greater than 3000 feet [914.4 meters), multiple paths of light can cause signal distortion at the receiving end, resulting in an unclear and incomplete data transmission so designers now call for single mode fiber in new applications using Gigabit and beyond.

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What is Metro Ethernet?

What service do you need? Metro Ethernet?

This was a blog post from I found from August that helps explain Metro Ethernet.

The author states:
Took some time working out, but my current understanding is that because you are providing some sort of video service out of your location, you will need a GigE private line from your location to the colo and then from there you will backhaul it to the network. Let me review the list of colos you will work out of.

Although your location doesn't look too good to me I will do what I can to help. In any event, please provide more detail and I will research your needs. Please get me the specs of your colo needs and possibly where you would backhaul too. I could then offer you colocation space, price the private line from your service there and maybe also from the colo back to the hub.

Read your blog and we do not provide the metro ethernet. We do have a very indepth Glossary list.

10:17 PM

Mark's I Just Read This Blog said...

Ethernet is, quite simply, plugging your network directly into a telecom provider's network.

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Top Network and T1 Glossary Terms

Glossary
I have included here a few of the most commonly used T1 and Network Cabling keywords. For an in depth list. Just use one of the blue links.


Cat 3 Cable: The Cat 3 Cable is a UTP (Unshielded Twisted Pair) cable, which reliably carries up to 10 Mbit/s of data. It has a possible bandwidth of 16Mhz. Cat 3 is still mostly in use in two-line telephone systems, but has been mostly superceded by the higher performing Cat 5 standard.

Cat 5 Cable: The Cat 5 Cable is a twisted pair cable, mostly unshielded (but there are shielded types.) It is designed for high signal integrity, and can carry up to 155 Mbit/s over short distances. It is used mostly for Ethernet networks, basic voice services and ATM's, but has been superceded on many industries by the Category 5e specification.

Cat 5e Cable: The Cat 5e cable is an enhanced Cat 5 cable, with added specifications for far end crosswalk. With its tighter specifications, it is an excellent choice for 1000BASE-T.

Cat 6 Cable: The Cat 6 cable is standard for Gigabit Ethernet and similar network protocols. It is backward compatible with the Category 5 and Category 5e standards. The Cat 6 cable standard delivers a bandwidth of up to 250Mhz. The Cat 6 cable is more effective for system noise and crosstalk.

Coaxial Cable: Coaxial Cable is an electrical cable, and consists of a round counducting wire covered by an insulating spacer, which is covered by a cylindrical conducting sheath, lastly covered by a final insulating layer. It is used for high-frequency transmissions and broadband.

Structured Cabling: The term “Structured Cabling” refers to a cabling infrastructure for a building or campus. It consists of many smaller elements, all standardized according to a specification. These are called subsystems.

Plenum Cabling: The term “Plenum Cabling” refers to structured cabling laid in the plenum of buildings (the space where air circulation – heating and air conditioning systems – are facilitated.) It has a slow-burning, fire-resistant casing.

Non-Plenum: Non-Plenum refers to structured cabling that run between floors (non-plenum areas), and rated more as riser cable.

Fiber Cabling: Fiber Cabling is the term used to refer to structured cabling using the Fiber Optic standard.

Fiber Optics: Fiber Optics is a loose term that refers to both the applied science and engineering fields that overlap in structuring fiber optic systems using optical fiber. Optical Fiber is very thin plastic or glass fiber wire, made from incredibly pure optical glass, designed to use light to carry digital signals.

Network Cabling: Network Cabling is a broad term referring to network or ethernet structures or cabling, for a building, office or campus.

RJ 45: The RJ-45 is the standard connector used for Ethernet, T1, ISDN, or 4-pair UTP cables.

RJ 11: RJ-11 is the standard connector used for 2-pair (4 wire) telephone wiring. It comes in both UTP or untwisted cable.

Ethernet: An Ethernet refers to the various computer networking technologies for a Local Area Network (LAN.)

LAN: LAN stands for Local Area Network and refers to a computer network for a small area, such as an office, home or group of buildings.

WAN: WAN stands for Wide area Network and refers to a computer network that covers a broad area, where communications can cross national, regional or metropolitan boundaries.

MEGABYTE: A unit for measuring computer memory or data storage. A unit of information equal to 1000 kilobytes.

GIGABYTE: A unit for measuring computer memory or data storage. A unit of information equal to 1000 megabytes.

TERABYTE: A unit for measuring computer memory or data storage. A unit of information equal to 1000 gigabytes.



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