VeEX RXT-6000e, User Manual

Page: 141 / 387

TX C2 [HP]
V5 [LP Path]: Path signal label
Program the TX and RX label by editing the hexadecimal value or by using the convenient drop-down
menu selection
For the RX label, enable or disable the Payload Mismatch (PLM) Alarm
TX V5 [LP]
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10.1.7 APS Tasks
10.1.7.1 APS Timing
This function measures the Automatic Protection Switching (APS) limits of the network. APS applies only to the
Multiplex sections of a SDH network and enables network elements to re-route traffic to a backup circuit in the event
of network failure or problems. The protection mechanism is coordinated by the K1 and K2 bytes in the Multiplexer
Section Overhead.
APS Standards
The principles and protocols of APS in SDH networks are defined in ITU-T G.783 and G.841 and Bellcore GR-
253 recommendations for Linear and Ring network architectures respectively. According to recommendations,
the re-routing of the signal has to occur within 50ms. Protection switching is initiated as a result of one of the
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