METRObility Optical Systems Radiance CWDM System, Инструкция по установке и эксплуатации

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Radiance CWDM System 11
Drop/Insert Module
The drop/insert module provides two local interface ports. One port removes a
wavelength-specific channel from the network fiber in one direction, and the
other port adds that same channel back onto the fiber in the opposite direction.
Because the drop/insert module supports two separate pathways going in
opposite directions, network viability in a ring topology is ensured even if there
is a break in the network.
On the west side, the drop/insert module removes a wavelength-specific channel
from the eastbound fiber and sends it to Local Interface A. To complete the
westbound connection, the drop/insert module receives the same channel from
Local Interface A and inserts it onto the westbound fiber.
The same happens on the east side, except in the opposite direction. The drop/
insert module removes the channel from the westbound fiber and sends it to
Local Interface B. To complete the eastbound connection, the drop/insert module
receives the same channel from Local Interface B and inserts it onto the east-
bound fiber.
The drop and insert completes the point-to-point connections between the two
local interfaces and two other devices located in the east and west. The other
devices may be a mux/demux, drop/pass, or drop/insert module.
RX
NETWORK
NETWORK
WEST
RX
EAST
1590
TX TX
Local Interface A
Local Interface B
O A D M D R O P / I N S E R T
DROP
INSERT
Drop and Insert
T
X
R
X
WEST EAST
Local Interface A
T
X
R
X
Local Interface B