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System cabling
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Figure 4-35 Aggregate fiber cables
ote: The routing of the fibers should be in accordance with the specifications for the
selected fiber. Care should be taken not to exceed the bending radius of about 30 mm
when placing the fibers. Exceeding the recommended radius may cause distortion and
poor signal quality. All fibers should be strain relieved to prevent any force from
being exerted on the connectors. Clean all connections, as required, before attaching
(see Appendix A,
Multiplex section protection
Linear MSP applications
For linear MSP applications, 4 × STM-1 or 2 STM-1 + 2 × STM-4 can be grouped into 2
× MSP groups. These groups can support linear MSP connections with east and west Es.
Terminal MSP applications
In terminal applications, between two optical STM-4 interfaces a 1+1 MSP protection
relation can be set up by the user. The protection switching can be configured revertive
and non-revertive and unidirectional and bi-directional (i.e. both directions of
transmission are, respectively, switching separately or jointly), provided the other end of
the MSP link supports the necessary features.
Support for forced, manual and lock-out switch commands is available. The MSP
implementation is compliant with G.841/Clause 7.1 and ETS 300417-3-1 (i.e. APS
protocol optimized for 1: protection). The ETSI failure of protocol applies. Under this
protocol, an alarm-free interworking mode with SO ET defined MSP is supported.
...................................................................................................................................................................................................................................
365-313-103R8.0
Issue 2 July 2009
"Fiber cleaning" (p.
Alcatel-Lucent – Internal
Proprietary – Use pursuant to Company instruction
Aggregate interfaces (Main board)
B-8)).
Fiber cabling
4-37
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