Cyan Z-Series Engineering and Planning Guide Release 5.0
700-0023-05-00 Rev. 1 © 2013 Cyan, Inc. – All Rights Reserved. Page 97
2.10 LAC-4P Lambda Aggregator CWDM Terminal Multiplexer
Cyan also provides the LAC-4P 4-channel CWDM add/drop with Express mux/demux module. The
external module is housed in an industry-standard LGX
®
form factor. The LAC-4 module is a passive
module that provides a 4-port CWDM optical mux/demux capability. It works in conjunction with the
SFT-8 module.
Channel spacing is at 20nm, following the standard CWDM wavelength grid. There are two versions of the
LAC-4P module:
• LAC-4P, 1610nm – 1550nm
• LAC-4P, 1530nm – 1470nm
The LGX-compatible form factor allows for simple installation with snap-in mounting. The LAC-4P
modules are installed without tools into any LGX-compatible shelf. You can mount up to three units into a
single LGX passive shelf.
The LAC-4P CWDM modules is deployable in incremental steps. Operators can start out with a 1x4
CWDM multiplexer and, as demand grows, add an additional 1x4 LGX packaged CWDM module to reach
8 wavelengths. Add Additional modules by simply daisy-chaining the units using the LAC-4P Express and
Common ports.
The graphic below shows a wiring example of the LAC-4P module and SFT-8 line card.
2.5G Wavelengths
Comm In / Comm Out
1470 In / 1470 Out
1490 In / 1490 Out
1510 In / 1510 Out
1530 In / 1530 Out
Comm In / Comm Out
Exp In / Exp Out
Exp In / Exp Out
1550 In / 1550 Out
1570 In / 1570 Out
1590 In / 1590 Out
1610 In / 1610 Out
2.5G Wavelengths
LAC-4P
LAC-4P
To Outside Plant
TX
RX
TX
1
RX
TX
2
RX
TX
3
RX
TX
4
RX
TX
5
RX
TX
6
RX
TX
7
RX
TX
8
RX
(CWDM)
(CWDM)
Figure 47: LAC-4P Wiring Example
LAC-4P Wavelength Assignment
LAC-4P
1470 – 1530
Wavelength
(nm)
1 1470
2 1490
3 1510
4 1530
LAC-4P
1550 – 1610
Wavelength
(nm)
5 1550
6 1570
7 1590
8 1610
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