K2 Byte (APS-Linear)
Data Communications Channel (DCC) Bytes (D4-D12)
DCC – together these nine bytes form a 576kbps message channel for OAM purposes.
They can be used for internally or externally generated messages or BER function.
S1 Byte (Synchronization Status)
Synchronization status message byte contains information about the quality of the embedded timing and is used to inform the remote Multiplexer of the clock quality
used to generate signals.
Bits 1-4 carry synchronization messages
Bits 5-8
0000 Synchronized - Traceability Unknown
0001 Stratum 1
0100 Transit Node Clock
0111 Stratum 2
1010 Stratum 3
1100 SDH Minimum Clock
1101 Stratum 3e
1110 Previsional by the Network Operator
1111 Not used for synchronization
Other bytes are reserved
S1 Byte (Synchronization Status)
Order Wire Byte (E2)
A 64kbps voice communication channel between multiplexers.
It’s a channel used by craft persons and will be ignored as it passes through regenerators.
The relief byte is used for ring protection
UX400 10G e-Manual D07-00-058P RevA00
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Summary of Contents for UX400
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