Sdh - lower-order path overhead, V5: vc path overhead, J2: path trace – EXFO FTB-8100 Series Transport Blazer for FTB-500 User Manual

Page 655: N2: network operator byte

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Glossary

SONET/SDH Application

641

SDH - Lower-Order Path Overhead

SDH - Lower-Order Path Overhead

V5: VC Path Overhead

The V5 byte provides the same functions for VC paths overhead that the B3,
C2, and G1 bytes provide for STM paths.

Note: If the signal label in V5 (bits 5, 6, and 7) is 101 the contents of the extended

signal label is valid and contains in a 32 bit frame multiframe. See K4
Structure shown below.

K4 Structure

J2: Path Trace

The J2 byte is used to repetitively transmit a Lower-Order Access Path
Identifier so that a path receiving terminal can verify its continued
connection to the intended transmitter.

N2: Network Operator Byte

The N2 byte is allocated for Tandem Connection Monitoring for the VC2,
VC-12, and VC-11 level.