
Figure 3-11
Networking diagram of the services on the two-fiber bidirectional MSP ring
NE1
NE2
NE4
NE3
1-SL4D-1
1-SL4D-2
1-SL4D-2
1-SL4D-1
1-SL4D-2
1-SL4D-1
1-SL4D-2
1-SL4D-1
Two-fiber bidirectional
MSP ring
3-SP3D
1-SL4D-1
1-SL4D-2
Tributary board Line board Line board
NE1:
3-SP3D
1-SL4D-1
1-SL4D-2
Tributary board Line board Line board
NE3:
1-SL4D-2
1-SL4D-1
Line board Line board
NE2:
1-SL4D-1
1-SL4D-2
Line board Line board
NE4:
3.7.2 Signal Flow and Timeslot Allocation
To configure the two-fiber bidirectional MSP service on a ring network, configure the services
that need to be added to the ring network on the source NE, to pass through the intermediate
nodes, and to be dropped from the sink NE, if the MSP protection subnet is already created. In
the case of the ring network, more than one route is available from the source NE to the sink
NE. In actual application scenarios, not all the routes need to be configured. Hence, you need
to properly plan and configure the service directions and timeslots before the configuration.
shows the service signal flow and timeslot allocation. In this example, five E1
services are configured so that the services enter the ring network from NE1, pass through NE2,
and then are dropped on the sink NE (NE3).
3 Configuring SDH Services
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
3-38
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-06-30)