Technical data

TraverseEdge 2020 Applications and Engineering Guide, Chapter 3: System Applications
Release 5.0.x Turin Networks Page 3-49
3.10.1 GbE Private Line Service
Figure 3-44 illustrates how TE-2020 nodes equipped with GbE PLMs can support a GbE private line ser-
vice. Many end users favor Ethernet private line services because they allow them to connect data net-
works using familiar, inexpensive, data-friendly Ethernet interfaces. The GbE PLM allows the SONET
network to support end-to-end, line-rate, point-to-point GbE private lines just as it supports DS3 and OC-
N circuits - including physical layer separation of traffic from different GbE "circuits." These capabilities,
in turn, allow service providers to deploy GbE private line services with the assurance that the network
supporting them will feature the survivability, manageability, interoperability, and reliability that charac-
terize SONET networks.
Figure 3-44 GbE Private Line Service
Figure 3-44 also illustrates how the various optics choices of the GbE PLM allow service providers to
reach end users with the best delivery method. For example, service providers can deliver both Ethernet
and traditional private line services to a Multi-Tenant Unit (MTU) by deploying a TE-2020 node at that
MTU. The TE-2020 would support either 1000Base-SX (up to 550 m over multi-mode fiber) or 1000Base-
LX (up to 10 km over single-mode fiber) to reach GbE private line subscribers within the MTU. The
1000Base-LX and 1000Base-ZX (up to 70 km over single-mode fiber) optics also allow service providers
to deliver GbE-only services to customers that they can reach directly with single-mode fiber.
3.10.2 Internet Access via Ethernet
Figure 3-45 illustrates the TE-2020 and GbE PLM in an Internet access application. In this example, at
each MTU a switch or router aggregates end user Internet traffic and presents it to a collocated TE-2020
over a GbE interface. The TE-2020 nodes provide line-rate GbE transport to a central location (e.g., Point
of Presence, or POP), where the Internet access traffic is further aggregated and moved upstream toward
the Internet backbone.