Summary


This chapter introduced the Cisco ONS 15454 Multiservice Transport Platform (MSTP). It detailed the common and interface cards that comprise the ONS 15454 MSTP system, including the purpose for which each card is used in the MSTP system. The ONS 15454 allows for flexible deployment of either TDM/Ethernet or DWDM services. For the DWDM application, a wide variety of fixed-channel optical add/drop units are available for services delivery. However, the most flexible aspect of the ONS 15454 MSTP resides in its ROADM capability. ROADM deployments provide many benefits to DWDM networks, among them reduced equipment-sparing requirements, "SONET-like" services delivery, and streamlined DWDM system engineering. Moreover, the ONS 15454 MSTP allows for choice and flexibility in DWDM topology layouts. From the simplest point-to-point topology to more advanced ring or mesh topologies, the MSTP chassis layout can easily be tailored to fit within the DWDM services constraints.

This chapter and subsequent chapters cover the 32-channel, C-band operations of the ONS 15454 MSTP. At press time, a future software/hardware release of the ONS 15454 MSTP would increase the system's capability by making use of the L-band DWDM wavelength channels. The L-band implementation is primarily intended to operationalize DWDM with dispersion-shifted fiber (DS-fiber). Because of excess fiber nonlinearities with DS-fiber, the C-band DWDM channels are severely performance-limited, so most carriers do not use DS-fiber for C-band DWDM implementations.

Additionally, the ONS 15454 MSTP service capacity is being enhanced with new 10-Gbps transponder/muxponder interface cards. To alleviate equipment-sparing requirements, each of the 10-Gbps transponder/muxponder interface cards allows for entire C-band and L-band tunability, versus the current four-channel, C-band tunability. In addition, the ONS 15454 MSTP service mix will be enhanced using the availability of a new 10-Gbps transponder for Ethernet and storage interconnect protocols.




Building Multiservice Transport Networks
Building Multiservice Transport Networks
ISBN: 1587052202
EAN: 2147483647
Year: 2004
Pages: 140

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net