Page 244 - Optical Switching And Networking Handbook

10_200023_CH09/Bates 1/17/01 9:45 AM Page 229

Cost Implications and Financial Trending 229

Ring internetworking
Mesh and restoration products

All these features save the carriers significant amounts of money
in their local and long-haul networks. This, of course, is the goal and
is being met daily with the products that are in development or in
actual networks today.

Implementing DWDM

Deploying more fibers has been the primary choice for many years
for expanding network capabilities. Each new fiber could add up to
2.4 Gbps. This has always been an expensive procedure, but

Figure 9-10
Optical cross- WDM WDM Terminal
connect in WDM
mesh (Tellium)
Optical Cross Connect

OXC
WDM WDM

Transponder
TDM Mux 4 TDM Mux 8 TDM Mux 12 TDM Mux 16

Source: Tellium