The SONET/SDH Ultramapper
Overview
The SONET/SDH Ultramapper device integrates the SONET/SDH line, path, and tributary termination functions with M13/E13 multiplex functions and the primary rate framing function. It is designed to drive either an OC-12/STM-4 or OC-3/STM-1 optical signal directly or to allow for modular growth in terminal or add/drop applications.

The Ultramapper provides a versatile interface for all STS-12/STM-4, STS-3/STM-1, and STS-1 termination applications in point-to-point scenarios and for ring applications. This chip can be used in tributary shelf applications for up to 84 T1 or J1 or 63 E1 line cards, providing all possible mappings into SONET/SDH, because of the flexibility of the mappings, software upgrades from M13/E13 mapped connections to VT/TU mapped connections are possible. This device can also be used for DS3/E3/DS2 applications.

A single Ultramapper is capable of processing the aggregate bandwidth of one STS-3/STM-1 to 84/63 DS1/E1s. Further, a single Ultramapper can process the aggregate bandwidth of two STS-3/STM-1s, terminated as an STS-12/STM-4, to six DS3/E3s. Additionally, a single Ultramapper can function as an STS-12/STS-3/STM-4/STM-1 add-drop MUX by terminating up to three STS-1/STM-0 channels or one AU-4 channel and using the internal pointer processors to forward any nonterminated channels. By communicating to three other mate devices via the serial STS-3/STM-1 link interface, it is capable of terminating a full STS-12/STM-4 signal.