Telecommunications Glossary of terms used on this site

There are 236 entries in this glossary.
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Term Definition
OAMP

Operations, Administration, Management and Provisioning

OC

Optical Carrier

OC12

OC12, or OC-12 is an Optical Carrier transmission rate of 622 Mbps or Megabits per second for digital communications over Synchronous Optical Networking (SONET) fiber networks.

Aliases (separate with |): OC-12
OC3

OC3, or OC-3 is an Optical Carrier transmission rate of 155 Mbps or Megabits per second for digital communications over Synchronous Optical Networking (SONET) fiber networks.

Aliases (separate with |): OC-3
OC48

OC48, or OC-48 is an Optical Carrier transmission rate of 2.4 Gbps or Gigabits per second for digital communications over Synchronous Optical Networking (SONET) fiber networks.

Aliases (separate with |): OC-48
OSI

Open Systems Interconnection or OSI model (OSI model) is a method of dividing a communications system into segments or layers, where each layer is a collection of related functions that offer services to the layer above it and receives services from the layer below. The OSI model consists of the following 7 layers; Physical Layer (Layer 1), Data Link Layer (Layer 2), Network Layer (Layer 3), Transport Layer (Layer 4), Session Layer (Layer 5), Presentation Layer (Layer 6) and Application Layer (Layer 7).

Aliases (separate with |): Open Systems Interconnection
OTN

Optical Transport Network

OVC

Operator Virtual Connection

OXC

An Optical Cross Connect, or OXC, is a network device which switches optical signals.

Aliases (separate with |): Optical Cross Connect
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