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
Path Overhead Layer
The following is a partial list of POH bytes and their corresponding functions:
J1 byte (STS Path Trace)
High Order VC-N path trace byte
A unique message is assigned to each path in a SDH network – therefore the path trace can be used to check
continuity between any location on a transmission path and the path source
This user programmable byte repeatedly transmits a 15-byte string plus 1 (CRC-7) byte so that a receiver can
continually verify its connection with the transmitter
A 64-byte free-format string is also permitted
The message is transmitted one byte per VC-4 frame
J1 Byte (HP Path Trace)
TX300S_e-manual_D07-00-064P_RevA00
Summary of Contents for VePAL TX300M
Page 1: ...TX300S_e manual_D07 00 064P_RevA00...
Page 12: ...23 0 About VeEX Go back to top TX300S_e manual_D07 00 064P_RevA00...
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Page 61: ...Tx Structure Setup Graphical Mode Tx Payload Setup TX300S_e manual_D07 00 064P_RevA00...
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Page 220: ...Pattern Setup Results Errors Alarms TX300S_e manual_D07 00 064P_RevA00...
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Page 261: ...Go back to top Go back to TOC Errors Alarms Page 2 TX300S_e manual_D07 00 064P_RevA00...
Page 369: ...OAM LMM Parameters OAM Service DMM OAM DMM Message TX300S_e manual_D07 00 064P_RevA00...
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