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Glossary
CTS 710 SONET Test Set User Manual
Glossary–5
status and maintenance information between two network
elements.
POH
An acronym for Path Overhead.
PTE
An acronym for Path Terminating Equipment.
Rx
An abbreviation for Receive.
Section
The portion of a transmission line between a Network Element
(NE) and a Line Terminating Equipment (LTE) or two LTEs.
Section Coding Violation (CV)
A BIP error that is detected at the Section layer. CVs for the
Section layer are collected using the BIP-8 in the B1 byte
located in the Section overhead of STS-1 number 1.
Section Errored Second (ES)
A second during which at least one Section CV or OOF/COFA
event occurred, or a second during which the NE was (at any
point during the second) in the LOS state.
Section Overhead (SOH)
A set of bytes allocated within each frame to carry framing and
error monitoring information between an NE and LTE or
between two LTEs. Part of the transport overhead.
SES
An acronym for Severely Errored Seconds.
Severely Errored Seconds (SES)
A second with more than N CVs. N varies with the transmit rate
but corresponds to a BER of 2 × 10
–7
.
SOH
An acronym for Section Overhead.
Glossary
CTS 710 SONET Test Set User Manual
Glossary–5
status and maintenance information between two network
elements.
POH
An acronym for Path Overhead.
PTE
An acronym for Path Terminating Equipment.
Rx
An abbreviation for Receive.
Section
The portion of a transmission line between a Network Element
(NE) and a Line Terminating Equipment (LTE) or two LTEs.
Section Coding Violation (CV)
A BIP error that is detected at the Section layer. CVs for the
Section layer are collected using the BIP-8 in the B1 byte
located in the Section overhead of STS-1 number 1.
Section Errored Second (ES)
A second during which at least one Section CV or OOF/COFA
event occurred, or a second during which the NE was (at any
point during the second) in the LOS state.
Section Overhead (SOH)
A set of bytes allocated within each frame to carry framing and
error monitoring information between an NE and LTE or
between two LTEs. Part of the transport overhead.
SES
An acronym for Severely Errored Seconds.
Severely Errored Seconds (SES)
A second with more than N CVs. N varies with the transmit rate
but corresponds to a BER of 2 × 10
–7
.
SOH
An acronym for Section Overhead.