Applications
2-10 Issue 8.0 July 2002
Limited STS-1 cross-connections allow three DS3 or EC-1 circuits from various
nodes in a network to be routed to a single destination and output as an OC-3
signal. In Release 7 and later releases, the FT-2000 OC-48 Add/Drop-Rings
Terminal also has an STS-1 TSA capability that allows STS-1 cross-connections.
The STS-1 cross-connections allow individual DS3 or EC-1 circuits from various
nodes in a network to be routed to a single destination node. For more information
about cross-connections, refer to Volume I, Section 8, “Administration and
Provisioning.”
OC-48 Hubbing 2
The FT-2000 OC-48 Add/Drop-Rings Terminal supports OC-48 hubbing. An
FT-2000 OC-48 Add/Drop-Rings Terminal can serve a cluster of DDM-2000 OC-3
Multiplexers located at remote sites in the loop environment. Figure 2-5 shows an
FT-2000 OC-48 Add/Drop-Rings Terminal serving as an OC-48 hub. The OC-48
hub supplies OC-3 optical extensions and local DS3 and/or EC-1 low-speed
interfaces. All the traffic for the DDM-2000 OC-3 Multiplexers passes through the
OC-48 hub using the OC-3 optical extensions.
The FT-2000 OC-48 Add/Drop-Rings Terminal provides single-ended operation
capabilities through the OC-3 data communications channel (DCC). The OC-12
also provides this same DCC capability. For more information about the
single-ended operation capabilities, refer to the “Operations Interworking”
application in this section. For more information about operations interworking
between the FT-2000 OC-48 Lightwave System and the DDM-2000 Multiplexers,
refer to 824-102-147,
2000 Product Family Operations Interworking Guide
.
Figure 2-5. OC-48 Hubbing Application
FT-2000*
OC-48
OC-48
FT-2000*
OC-3
DDM-2000
DDM-2000
OC-3
DS3
EC-1
Remote Sites
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