Introduction
OptiX OSN 3500 TM - SD
1-8
1.2.7 Equipment Level Protection
Table 1-4 shows the equipment level protection provided by the OptiX OSN 3500.
Table 1-4
Equipment level protection provided by the OptiX OSN 3500
Items protected
Protection scheme
E1/T1 processing board
1:N (N
≤
8) TPS
E3/DS3 processing board
1:N (N
≤
3) TPS
E4/STM-1 processing board
1:N (N
≤
3) TPS
Cross-connect and timing unit
1+1 hot backup protection
SCC unit
1+1 hot backup protection
-48V power interface board
1+1 hot backup protection
3.3V board power supply
1:N centralized hot backup protection
* The OptiX OSN 3500 supports three TPS groups of different types at the same time.
1.2.8 Networking and Protection
Being an MADM system, the OptiX OSN 3500 can provide processing capacity for up
to 40 Embedded Control Channels (ECCs), fully meeting the requirements for
complicate networking. It is applicable to various networks at
STM-1/STM-4/STM-16/STM-64 level, such as chain, ring, hub, ring with chain,
tangent rings and intersection rings. For protection at network level, the OptiX OSN
3500 supports 4-fiber/2-fiber Multiplex Section Protection (MSP) ring, linear MSP,
shared optical path virtual trail protection and Subnetwork Connection Protection
(SNCP). Table 1-5 shows the maximum number of the MSP ring supported by the
OptiX OSN 3500.
Table 1-5
Maximum number of the MSP ring supported by the OptiX OSN 3500
Protection scheme
Max. number of MSP ring supported
STM-64 4-fiber MSP ring
1
STM-64 2-fiber MSP ring
2
STM-16 4-fiber MSP ring
2
STM-16 2-fiber MSP ring
4
1.2.9 Squelching Function in Multiplex Section
Each protection time slot in multiplex section protection ring is shared by traffic from
different segments or occupied by extra traffic. With no extra traffic in the ring, and