Description:

The OC-12 OAU performs all necessary synchronization, pointer and overhead processing. To provide traffic protection, two OAUs can be installed. One OAU, installed in the OAU-A slot, provides the optical interface to the working ring. The other OAU, installed in the OAU-B slot, provides the optical interface to the protection ring.

The OC-12 OAU is available in intermediate-reach and long-reach versions. The standard versions of the OC-12 OAU can be mounted in the OSIRIS STD Shelf, the OSIRIS Micro Shelf and the OSIRIS Micro Wallmount Unit (WMU). For the OSIRIS XTD and XTS shelves, the OAUs are mechanically coupled with buffer interface units (BIUs) via a slider system. The OAUs have two connectors for input/output connection to fiber patch cords. SC, ST and FC connectors are available.

Benefits:

• Capability to achieve wide-range distances and operate in a multi-vendor network
• Cost-effective and compact units
• Easy in-service capacity upgrade
• Multi-ring interconnection capability
• No requirement for external synchronization modules
• Robust SONET-based protection

Features:

• Various optical budgets and wavelengths available
• One-step multiplexing allowing time slot assignment
• Single OAU faces both east and west directions in a ring
• Drop-and-continue support
• Built-in synchronization circuitry
• Full support of unidirectional path switched ring (UPSR)
• Capability to interoperate with other SONET equipment
• Ability to drop any STS-1 from OC-12 line
• Support for concatenated traffic (STS-3c)