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Glossary
Glossary–4
CTS 710 SONET Test Set User Manual
Line Severely Errored Second (SES)
A second with N or more Line CVs, or a second during which
the line was in the Line AIS state. The value of N varies with
the transmit rate, but corresponds to a 2 × 10
–7
BER.
LOF
An acronym for Loss of Frame.
LOP
An acronym for Loss of Pointer.
LOS
An acronym for Loss of Signal.
LTE
An acronym for Line Terminating Equipment.
Mapping
The process of placing a tributary signal into a SONET SPE.
Mb/s
Megabits per second.
NE
An acronym for Network Element.
OC
An acronym for Optical Carrier.
OOF
An acronym for Out of Frame.
Optical Carrier Level N (OC-N)
An optical version of an STS-N signal.
Path
The portion of a transmission network between two terminal
multiplexers.
Path Overhead (POH)
A set of bytes allocated within the information payload to carry
Glossary
Glossary–4
CTS 710 SONET Test Set User Manual
Line Severely Errored Second (SES)
A second with N or more Line CVs, or a second during which
the line was in the Line AIS state. The value of N varies with
the transmit rate, but corresponds to a 2 × 10
–7
BER.
LOF
An acronym for Loss of Frame.
LOP
An acronym for Loss of Pointer.
LOS
An acronym for Loss of Signal.
LTE
An acronym for Line Terminating Equipment.
Mapping
The process of placing a tributary signal into a SONET SPE.
Mb/s
Megabits per second.
NE
An acronym for Network Element.
OC
An acronym for Optical Carrier.
OOF
An acronym for Out of Frame.
Optical Carrier Level N (OC-N)
An optical version of an STS-N signal.
Path
The portion of a transmission network between two terminal
multiplexers.
Path Overhead (POH)
A set of bytes allocated within the information payload to carry