Alcatel Carrier Internetworking Solutions 1850 TSS-5 User Manual

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Alcatel-Lucent 1850 TSS-5 Transport Service Switch  5
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.