OSIRIS OC3 Mapper Unit

The Positron OSIRIS multi-service Platform (MSP) is an integrated access solution for the rapidly expanding synchronous optical network (SONET) broadband markets. It delivers the most cost-effective, compact and simple-to-deploy solution for multiservice traffic such as data, voice and video.

OC-3 and OC-3c Mappers Technology

The OSIRIS solutions are designed to map various types of signals over a fiber ring. The OC-3 mapper provides access to up to three STS-1 signals (51.84 Mbps) onto a SONET ring, while keeping complete VT1.5 visibility. It can also be used to access one STS-3c signal (155.52 Mbps). The OC-3 mapper is available with IR-1, LR-1 or LR-2 interface with the choice of FC, SC or ST connectors.

s The OC-3c mapper provides access to one STS-3c signal (155.52 Mbps) onto a SONET fiber ring. The OC-3c mapper is available with a multimode interface with an SC connector, or with a single mode, intermediate reach (IR-1) interface with an ST connector.


  • Capability to carry asynchronous transfer mode (ATM) traffic onto SONET
  • Protected traffic from an add/drop multiplexer (ADM) to other equipment
  • Remote circuit testing and loopback
  • Capability to subtend rings (OC-3 only)


  • Efficient mapping of STS-3c signals
  • Support for automatic protection switching (APS) 1+1
  • Failure detection
  • VT1.5 alarm reporting and switching (OC-3 only)