These units form the main ROADM node at an add-drop site
and can handle anywhere from several to many tens of wavelengths. In addition,
DWDM transponders are also needed to convert client-side signals to network-side
ITU grid wavelengths and related costs vary per signal rate. Finally, two types of
Scenario Fast Ethernet Gigabit Ethernet 10 Gigabit Ethernet
Small 80 0 0
Medium 80 8 0
Large 80 12 8
TABLE 8.7 Overview of Traffi c Scenarios (EPL Connection Requests)
TABLE 8.8 Sample Subsystem Costs
EoWDM Solution EoS Solution
Subsystem Type Typical Cost Subsystem Type Typical Cost
Gigabit Ethernet transponder $4,000 OC-48 transponder $8,000
10 Gigabit Ethernet transponder $7,500 OC-192 transponder $12,000
8:1 Fast Ethernet to Gigabit Ethernet
thin-mux muxponder
$4,000 8:1 Gigabit Ethernet to OC-192
muxponder thin-mux
$14,000
8:1 Gigabit Ethernet to 10 Gigabit
Ethernet thin-mux muxponder
$8,000 OC-48 SONET add-drop
multiplexer unit
$10,000
DWDM SPRING protection module $4,000 OC-192 SONET add-drop
multiplexer unit
$20,000
ROADM (40 channel multiplex, amp,
local sections)
$30,000 SONET BLSR protection
switching module
$4,000
230 Chapter 8
thin-mux blades (muxponders) are also assumed for EoWDM to help aggregate slower
(full-rate Fast Ethernet) clients.
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