
3.8.1 Networking Diagram
The creation of an SNCP ring network is similar to the creation of an MSP ring network. For
example, the MSP and SNCP rings are constructed based on two fibers and their services must
pass through the intermediate nodes for transmission from the source NE to the sink NE. The
difference is that the SNCP protection and SNCP services can be created on the U2000 at a time.
shows an SNCP ring that comprises four pieces of MSTP equipment. In this
example, the SP3D boards are configured on the source NE (NE1) and the sink NE (NE3) as
tributary boards to add and drop services, and the SL1D boards are used as line boards to transmit
SDH services.
Figure 3-13
Networking diagram of the services on the SNCP ring
NE1
NE2
NE4
NE3
1-SL1D-1
1-SL1D-2
1-SL1D-2
1-SL1D-1
1-SL1D-2
1-SL1D-1
1-SL1D-2
1-SL1D-1
SNCP ring
3-SP3D
3-SP3D
3-SP3D
1-SL1D-1
1-SL1D-2
Tributary board Line board Line board
NE1:
3-SP3D
1-SL1D-1
1-SL1D-2
Tributary board Line board Line board
NE3:
1-SL1D-2
1-SL1D-1
Line board Line board
NE2:
1-SL1D-1
1-SL1D-2
Line board Line board
NE4:
3.8.2 Signal Flow and Timeslot Allocation
Similar to the service configuration of an MSP ring, you need to plan proper traffic directions
before configuring the services on an SNCP ring, if multiple service routes are available from
the source end to the sink end. In the case of the services on the SNCP ring, allocate timeslots
for the source slot of the working service and timeslots for the source slot of the protection
service, when allocating timeslots for source slots.
shows the signal flow of the services on the SNCP ring and the timeslot allocation
to the services on the SNCP ring. In the actual configuration, you can plan other proper working
paths and protection paths according to the requirement. In this example, the working service
route is NE1-NE2-NE3 and the protection service route is NE1-NE4-NE3. There are five E1
services.
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
3 Configuring SDH Services
Issue 02 (2011-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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