Many cable operators and some telcos
are using GE channels on WDM for delivery of video on demand (VOD).
Service Providers mostly use 10/100M fiber for connecting customers, yet the use of
1G fiber is growing quickly, while 10G Ethernet is on the upswing from a small base.
Many alternative Service Providers use less expensive copper 10/100M and 1G for
short reach connections in POPs and COs. Growing bandwidth speeds for connection
and aggregate traffic assure a long expanding market for Ethernet equipment.
Ethernet Runs on Many Technologies
The first use of Ethernet over DWDM is to connect customer LANs to POPs and COs for
WAN and Internet and also to other metro locations, or for data center backup, typically
using a 2.5G wavelength for a 1G or 2 ?— 1G Ethernet connection. CWDM is growing as
a less expensive alternative to DWDM for customer to provider access. CWDM (coarse
wave division multiplexing) growth is slowed by decreasing prices in DWDM (dense
WDM), which has narrowed the price difference between CWDM and DWDM.
Standards bodies, such as the EFMA, are driving the adoption of technologies like
Ethernet over copper (VDSL, G.
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