Huawei OptiX OSN 7500 - Figure 6-19 VP;VC-Ring; Table 6-6 Classification of ATM Protection

OptiX OSN 7500
Technical Manual - System Description 6 Data Features
Huawei Technologies Proprietary
6-23
accesses STM-1 ATM traffic through the optical interface and then implements ATM
switching and protection configuration. The ATM traffic from NE1 is also dropped at
NE2 for ATM layer processing. Then the locally accessed traffic and that from NE1 are
encapsulated into the same VC4-Xv and sent to the next NE. The same goes at NE3
and NE4. A single VP/VC-Ring can have a maximum bandwidth of 300 Mbit/s.
VC4-Xv
VP/VC-Ring
NE 2
NE 4
NE 1
NE 3
34M ATM
Traffic
34M ATM
Traffic
155M ATM
Traffic
622M ATM
Traffic
DSLAM
DSLAM
Router
DSLAM
The ATM traffic from NE1
is droped to the NE2, then
send to VP/VC-Ring after
converged with local
service.
Figure 6-19 VP/VC-Ring
6.3.3 Protection
The ATM service of the OptiX OSN equipment is protected on many layers, including:

Protection on the ATM layer

Protection on the optical transmission layer, such as MSP, and SNCP.
1. Protection on the ATM Layer
Compliant with ITU-T Recommendation I.630, protection on the ATM layer can be
classified into many types according to different classification method, as shown in the
Table 6-6. You can select the configuration as required, for example, 1+1 bidirectional
non-revertive protection”.
Table 6-6 Classification of ATM protection
Classification mode 1+1 protection 1:1 protection
Switching direction Unidirectional protection Bidirectional protection
Connection level VPC protection VCC protection