LambdaDriver 400 & 800
ML46430, Rev. 07
October 2004
For greater cabling lengths, an OA module (described in the section
page
−
in the LDx00 to serve as a booster or pre-amplifier, or
−
into the fiberoptic cabling interconnecting two LDx00s to serve as an in-line
amplifier.
(A second OA module
increases
the operating distance by twice as much.)
18. OA modules operate in DWDM mode only.
19. For interconnecting modules
within
an LDx00 as well as
between
LDx00s, use only
singlemode 9/125
µ
m fiberoptic cabling.
20. If two OADMs are present in an LDx00 for multiple channel Adds/Drops, the
OUT
port of
either OADM must be connected to the
IN
port of the other OADM. (The remaining
IN
port is connected to the next upstream LDx00 and the remaining
OUT
port is connected
to the next downstream LDx00.)
21. LD400 In dual-fiber applications, to allow four transponders to be installed in an LD400
an OADM must be used instead of 1 Mux and 1 Demux module. In single-fiber
applications, a Demux module can be used instead.
22. If Y-cables
are used: For each pair of mutually redundant transponders, allocate a pair
of adjacent slots, so that the odd-number slot has the smaller number.
Valid slot pairs are: 1,2 and 3,4 and 5,6 and 7,8 and 9,10.
Invalid slot pairs are: 2,3 and 4,5 and 6,7 and 8,9 and 10,11 because in each case the
odd number is higher.
23. A transponder configured to operate in redundancy mode and installed in an
odd
-number
slot will be set by the LDx00 as the
Primary
transponder of the pair. A transponder
configured to operate in redundancy mode and installed in an
even
-number slot will be
set by the LDx00 as the
Secondary
transponder of the pair.
24
Examples of network topologies using the Y-cable are shown in
Appendix I:
Redundancy Protection Network Topologies
.
99
