 Optical Fiber Cabling
General FAQ
Fiber Testing FAQ
General FAQ
7. Cable Design Criteria
Pulling Strength: Some cable is simply laid into cable trays or ditches, therefore pull strength is not too important. But other cable may be pulled thorough 2 km or more of conduit. Even with lots of cable lubricant, pulling tension can be high. Most cables get their strength from an aramid fiber, a unique polymer fiber that is very strong but does not stretch - so pulling on it will not stress the other components in the cable. The simplest simplex cable has pull strength of 100-200 pounds, while outside plant cable may have a specification of over 800 pounds.
Water Protection: Every outdoor cable must be protected from water or moisture. It starts with a moisture resistant jacket, usually PE (polyethylene), and a filling of water-blocking material. The usual way is to flood the cable with a water-blocking gel. It's effective but messy - requiring a gel remover. A newer alternative is dry water blocking using a miracle powder - the stuff developed to absorb moisture in disposable diapers. Check with your cable supplier to see if they offer it.
Fire Code Ratings: Every cable installed indoors must meet fire codes. That means the jacket must be rated for fire resistance, with ratings for general use, riser (a vertical cable feeds flames more than horizontal) and plenum (for installation in air-handling areas. Most indoor cables us PVC (polyvinyl chloride) jacketing for fire retardant.
8. Types of Connectors & Adaptors
There are many types of connectorsand adaptor. Choosing which one to use is usually decided by the type of connector already installed in the equipment to be connected.
When deciding upon the proper cable to use, there are only three issues to consider.
- Is it compatible with my equipment?
- Will I be using it in extremely hazardous conditions?
- Does it require special clearance?
Connectors
SC, ST, & LC Connectors are pre-polished, field installable connectors that eliminate the need for hand polishing in the field .Caledonian fiber optic connectors provide an immediate termination to either single-mode or multimode fibers.
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FC Connector |
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FC connector is the most widely used fiber optic connector in
telecommunication industry. Different boot sizes, including
3.0mm, 2.0mm or 0.9mm, are available. Multi-pieces connectors are suitable for factory assembly. Any parts of the FC connectors can be sold separately. |
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SC Connector |
SC connector is another popular type of 2.5mm ferrule
connector. With the plastic clip, two simplex connectors can clip together and form a duplex connector. A wide
range of SC connectors are available in stock. |
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ST Connector |
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The ST connector was originated by AT&T Bell
Laboratories for use in premises wiring of buildings
and other applications. Available in single-mode and
multimode the ST style connector is a low cost and
reliable connection solution in the industry. |
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LC Connector |
LC connector provides duplex connections in 50%
less space. Available in multimode and single-mode
version. Pull-proof. |
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MU Connector |
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MU connector is another type of next generation
connectors that use 1.25mm ferrule. Its compact design
allows more organized and dense front panel
arrangement. |
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MT-RJ Connector |
MT-RJ connector is becoming more popular in both
datacom and telecom applications which use
duplex transceivers. It uses almost the same real
estate in patch panels and networking equipment as
other 2.5mm ferrule connectors but doubles capacity. |
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FDDI Connector |
Used for networking applications. Duplex connector with fixed shroud, keyed. |
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SMA Connector |
The SMA fiber connector is decreasing in popularity. |
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D4 Connector |
Same as SMA Connector, it is decreasing in usage. |
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Adaptors
Used to mate industry standard connectors, adapters are available with metal and ceramic alignment sleeves, and are color coded for easy identification. It is available in SC, FC, ST, LC, MU, MT-RJ, MTP & Hybrid.
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SC Adaptor |
SC adapters are used to mate industry standard sc
connectors. Adapters are available with metal and
ceramic alignment sleeves, and are color coded
for easy identification. The duplex adapters
accept two simplex connectors or one duplex
connection Hybrids are available for special
applications. |
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FC Adaptor |
FC adapters connect industry standard FC
connectors and are available in Square-Mount
D-Mount and Flange-Mount versions.
Our FC adapters feature a metal body for
long life and are available with either ceramic
or metallic sleeves. |
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LC Adaptor |
LC style adapters are used in high density
applications and feature a quick plug in
installation. Adapters are available in both
simplex and duplex designs and utilize high
quality zirconia’s and phosphorous bronze
sleeves. |
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ST Adaptor |
ST adapters connect industry standard ST
connectors and are available in D-Mount and
Flange-Mount versions. ST adapters are
available with ceramic or metallic sleeves
feature a metal body for long life, and easily
install in panel mount applications. |
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MT-RJ Adaptor |
MT-RJ adapters connect industry standard
MT- RJ connectors in high-density applications.
The adapters are keyed for proper alignment and
conform to RJ-45 modular plates. Mounting
hardware is not included. Available in
single-mode or multimode. |
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