Figure 3-6 Signal Flow And Timeslot Allocation Of The 1+1 Linear Msp Services - Huawei OptiX OSN 550 Configuration Manual

3 Configuring SDH Services
As shown in
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When the working path from NE1 to NE2 becomes faulty, in the case of single-ended switching,
the signal flow is as follows:
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When the working path from NE1 to NE2 becomes faulty, in the case of dual-ended switching,
the signal flow is as follows:
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Figure 3-6 Signal flow and timeslot allocation of the 1+1 linear MSP services

VC4-1:1-5(VC12)
5xE1 services are
added/dropped
3-16
Figure 3-6, the signal flow and timeslot allocation are as follows:
Traffic direction from NE1 to NE2: NE1→NE2
Services are added to the source NE (NE1) and are transmitted to the working path and
protection path at the same time. Then, the services are dropped from the sink NE (NE2),
which selects the services from the working path.
Traffic direction from NE2 to NE1: NE2→NE1
Services are added to the source NE (NE2) and are transmitted on the working path and
protection path at the same time. Then, the services are dropped from the sink NE (NE1),
which selects the services from the working path.
The services between NE 1 and NE2 occupy VC-12s 1-5 of VC4-1 (VC4-1:VC-12:1-5) on
the SDH link between NE1 and NE2. The capacity of the services is 5xE1.
Traffic direction from NE1 to NE2: NE1→NE2
Services are added to the source NE (NE1) and are transmitted on the working path and
protection path at the same time. Then, the services are dropped from the sink NE (NE2),
which selects the services from the protection path.
The services from NE2 to NE1 are not affected, and the traffic direction is NE2→NE1.
Services are added to the source NE (NE2) and are transmitted on the working path and
protection path at the same time. Then, the services are dropped from the sink NE (NE1),
which selects the services from the working path.
Traffic direction from NE1 to NE2: NE1→NE2
Services are added to the source NE (NE1) and are transmitted on the working path and
protection path at the same time. Then, the services are dropped from the sink NE (NE2),
which selects the services from the protection path.
Traffic direction from NE2 to NE1: NE2→NE1
Services are added to the source NE (NE2) and are transmitted on the working path and
protection path at the same time. Then, the services are dropped from the sink NE (NE1),
which selects the services from the protection path.
3-SP3D
NE2
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3-SP3D 1-SL1D-1
Traffic direction of
the working path
Traffic direction of
the protection path
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OptiX OSN 550 Multi-Service CPE Optical Transmission
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Configuration Guide
1-SL1D-1
VC4-1:1-5(VC12)
3-SP3D
NE1
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1-SL1D-1
3-SP3D
Issue 02 (2011-06-30)
System
5xE1 services are
added/dropped