Technical data

TraverseEdge 2020 Applications and Engineering Guide, Chapter 3: System Applications
Release 5.0.x Turin Networks Page 3-51
protection for the OC-192 interface. Moreover the TE-2020 supports a range of optics choices for OC-192;
Figure 3-47 shows the TE-2020 nodes equipped with ITU-grid DWDM OC-192 interfaces, which allow
the use of inexpensive passive DWDM multiplexers in many fiber-relief applications.
Figure 3-47 Bulk Interoffice GbE Transport
3.10.5 GbE PLM Operation
The GbE PLM provides up to line-rate, point-to-point transport of Ethernet frames using a standard Ether-
net over SONET (EoS) encapsulation. In this model, all valid Ethernet frames that enter the network over
a GbE interface exit the network over another, pre-defined GbE interface. This allows the SONET network
to emulate an "Intelligent Wire" (or, more precisely, a pair of fibers), rather than a complex network of
Ethernet switches. Figure 3-48 illustrates the Turin Networks "Intelligent Wire."
Figure 3-48 "Intelligent Wire" GbE Transport Model
In the ingress direction, the GbE PLM terminates the GbE physical layer, including the 8B/10B line-cod-
ing. Valid Ethernet frames are encapsulated using the Generic Framing Procedure - Frame mapped mode
(GFP-F), as defined in ITU-T G.7041b or X.86 (in place of GFP) on a per card basis. The resulting GFP
frames are mapped into a virtually concatenated SONET connections. The connections from each GbE
port on the PLM are combined into an STS-48 signal, which is transferred across the CCT connector to
both CCTs. The CCT performs the SONET STS switching function for each constituent STS in the concat-
enated connections.
Optional
OC-192
protection
GbE #1
GbE #8
•
•
•
GbE #1
GbE #8
•
•
•
VLX2020 VLX2020
GbE and/or
DS3, EC-1, OC-n
•
•
•
GbE and/or
DS3, EC-1, OC-n
•
•
•
VLX2020 VLX2020
D
W
D
M
D
W
D
M
•
•
•
•
•
•
Passive DWDM terminals
White Rock Networks Portion
Customer
Switch or
Router