Applications
Issue 8.0 July 2002
2-21
Broadband Service Transport —
STS-3c/STS-12c 2
The FT-2000 OC-48 Add/Drop-Rings Terminal equipped with Release 5.0.1-ADR
or later software and OC-3 low-speed interfaces supports the broadband service
transport application. This allows the FT-2000 OC-48 Add/Drop-Rings Terminal to
transport STS-3c payloads generated by asynchronous transfer mode (ATM)
products and nonswitched services such as medical imaging. With Release
7.1-ADR software, OC-12 low-speed interfaces, and high-speed optics with
STS-1 granularity, STS-12c payloads may be transported.
Figure 2-10 shows a two-fiber bidirectional ring equipped with FT-2000 OC-48
Add/Drop-Rings Terminals. The FT-2000 OC-48 Add/Drop-Rings Terminals are
connected to ATM service multiplexers and switches with OC-3 low-speed
interfaces. The FT-2000 OC-48 Add/Drop-Rings Terminals at CO 1 and CO 2 are
optical hubs that provide OC-3/OC-12 optical extensions to ATM service
multiplexers. The STS-3c payload may pass through other transmission
equipment before reaching the FT-2000 OC-48 Add/Drop-Rings Terminal (for
example, a DDM-2000 Multiplexer). It is anticipated that an STS-12c signal(s) will
not pass through other transmission equipment before reaching the FT-2000
OC-48 ADR Terminal.
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