Multifunctional
Even by today’s competitive stan- dards, the 1850 TSS-5 is distinctly versatile and multifunctional.
Fast Ethernet (FE) traffic can be aggregated onto up to 4 GigE ports and these ports can be electrical or optical, depending on the available or desired infrastructure. The 1850 TSS-5 supports carrier Ethernet services such as point-to-point Ethernet line (E-line) and virtual Ethernet LAN (E-LAN) with robust, standards-based quality of service (QoS) and reliability.
The 1850 TSS-5 provides high-speed optical transport for OC-3 and OC-12 linear optical extensions, while unidirectional path switched ring/Subnetwork Connection Protection (UPSR/ SNCP) switching can be used at the synchronous transport signal level 1 (STS-1), STS-3c and virtual tributary (VT) 1.5 levels. Further, only minimal provisioning is
necessary for private-line Ethernet over synchronous optical network/ synchronous digital hierarchy (SONET/SDH) links between two end-points, typically just SONET/ SDH cross-connections. Standard SONET/SDH loopbacks are also supported, including terminal loopback, facility loopback and external optical loopback.
The 1850 TSS-5 has several cross-connect capabilities, offering network designers greater flexibility in directing traffic flow through systems to support a wide variety
of customer applications using two-way cross-connections. Where a SONET/SDH ring is created, protection switching is done independently for each SONET/ SDH path. UPSR/SNCP rings operate in an integrated, single- ended fashion, eliminating the need for complex, network-level coordination in the effort to restore traffic.
