Lucent Technologies 1850 TSS-3 Switch User Manual


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Alcatel-Lucent 1850 TSS-3 Transport Service Switch 5
Figure3showsthe1850TSS-3inanEoPDH
configuration, installed with CPE in a standard
building or at a cellular tower. In each case, there
isapre-existingcopperconnectioncapableof
carryinganE1/DS1channeloranE3/DS3chan-
nel connected to a legacy synchronous optical
network(SONET)/SDHnetwork.
By inserting the 1850 TSS-3 into the copper
connection,EoPDHisestablished.Ethernet
packetsaremappedtothePDHlinesusinga
standards-compliant mapping mechanism, VCAT/
GFP,withredundancyprovidedbyPDH1+1
protection.IfseveralE1/DS1orE3/DS3linesare
available, they can be bonded together to create
a higher-bandwidth Fast Ethernet (FE) or rate-
restricted GigE pipe.
Figure 3. Ethernet over PDH
InFigure4,the1850TSS-3isintheEthernetextensionconguration.Inthisconguration,electrically-
based FE or GigE is converted to optical Ethernet for transmission over longer distances than are
possible with copper lines. Transmission complies with the Ethernet in the first mile (EFM) standard,
bringing the service provider’s Ethernet domain right up to the customer’s building or cell site.
Figure 4. Ethernet Extension
1850 TSS-3Ethernet/
FE/GigE
Service Provider
Equipment
Ethernet over E3/DS3
Demarcation
Wireless Access
Equipment
Customer
Equipment
1850 TSS-3Ethernet/
FE/GigE
Ethernet over E31/DS1
Legacy PDH/SDH
Network
1850 TSS-3Ethernet/FE
Service Provider
Equipment
GigE/FE with EFM OAM
Demarcation
Wireless Access
Equipment
Customer
Equipment
1850 TSS-3Ethernet/FE
GigE with EFM OAM
Metro Ethernet
Network
(Ethernet or MSPP
or CWDM-based)
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