SDH Transportation with 1+1 protection in network interface

STM AO-64 1+1 dispatch STM64 SDH and 10GbE WANs traffic. It is a module with multiple applications, from optical adapter (multimode/singlemode / short/long-range) to 1+1 protection element for SDH STM64/10GbE WAN backbones, including xWDM designs. Another typical application is as network terminator, allowing to separate SDH/10GbE WAN operatos transport network from the customer's network, providing if desired, 1+1 redundancy..

Digital Diagnosis

The Optical adapter AO STM-64 1+1 can be inserted into standalone chassis or into managed chassis (MicroSAE with SNMP module, MiniSAE, MetroSAE or chassis TriSAE). Using the facilities of remote management it is possible to monitor the following parameters:

• Received optical power
• Optical power emitted
• Current polarization
• Operating Temperature

In addition, it allows the execution of loops on both XFP interfaces, helping to detect failures in the network

Redundant interface

AO STM-64 1+1 has three optical interfaces: the two upper interfaces are for the network link and can be configured with different optical scope (1+1 and 1+0) according to the XFP module inserted, depending on the route of fiber available for redundancy.

Once it is defined a default route several policies are available of redundancy in case of fail of the main fiber: reversible switching (back to the main road in recovery), non-reversible (stays in the path switched until an event occurs that causes a new switching to another route) and forced switching.

Applications

• Economic protection of STM-64 services through two fibers or different lambdas.
• Demarcation point between carrier's SDH network services and customers.
• Low-latency regenerator for SDH STM-64 channels
• Integration of STM-64 services in CWDM and DWDM networks.

Table of optical parts and dynamic range

Examples of application