Glossary
| Term | Main definition |
|---|---|
| O |
Orange, when used in conjunction with color-coding for
twisted-pair cabling.
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| OC-1 |
Optical carrier level one, equal to 51.84Mbps. This is a
SONET channel, whose format measures 90 bytes and
is composed of the transport overhead and the synchronous
payload envelope.
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| OC-12 |
SONET channel of 622.08Mbps.
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|
| OC-192 |
SONET channel of 10Gbps, currently the highest level
now available.
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| OC-3 |
SONET Channel of 155.52Mbps.
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|
| OC-48 |
SONET channel of 2.5Gbps.
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| Octet |
Eight bits (also called a byte).
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| OCWR Optical continuous wave reflectometer | A device that measures optical return loss, or the loss of optical signals due to reflection back toward the transmitter.
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| ODC Optical directional coupler | A directional coupler used to combine or separate optical power.
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| OFCP |
An optical fiber cable that has conducting (metal) elements
in its construction and that meets the plenum test
requirements of NFPA 262; examples of conducting elements
in the cable include the copper wire or interlock
aluminum armoring.
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| OFCR |
An optical fiber cable that has conducting (metal) elements
in its construction and that meets the riser test
requirements of UL 1666; examples of conducting elements
in the cable include the copper wire or interlock
aluminum armoring
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| Off-hook |
The handset
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| Office principle ground point (OPGP) |
The main grounding point in a central office. Usually
connects directly to an earth ground like a water pipe.
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| OFNP |
An optical fiber cable that has no conducting (metal) elements
and meets the plenum test requirements of NFPA
262 (UL910).
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| Ohm | A unit of electrical resistance. The value of resistance through which a potential of one volt will maintain a current of one ampere. Named after Georg Ohm. Ω = Ohm
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