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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.8.6 MXP_MR_2.5G and MXPP_MR_2.5G Cards
supports framing. Finally, the output signal is serialized and connected to the trunk front end with a
direct modulation laser. The trunk receive signal is converted into an electrical signal with an avalanche
photodiode (APD), is deserialized, and is then sent to the TADM framer and FPGA.
The MXPP_MR_2.5G is the same, except a 50/50 splitter divides the power at the trunk interface. In the
receive direction, there are two APDs, two SERDES blocks, and two TADM framers. This is necessary
to monitor both the working and protect paths. A switch selects one of the two paths to connect to the
client interface.
Figure 16-67 MXP_MR_2.5G and MXPP_MR_2.5G Block Diagram
Caution You must use a 20-dB fiber attenuator (15 to 25 dB) when working with the MXP_MR_2.5G and
MXPP_MR_2.5G cards in a loopback configuration on the trunk port. Do not use direct fiber loopbacks
with the MXP_MR_2.5G and MXPP_MR_2.5G cards. Using direct fiber loopbacks causes irreparable
damage to the MXP_MR_2.5G and MXPP_MR_2.5G cards.
16.8.6.3 MXP_MR_2.5G and MXPP_MR_2.5G Safety Labels
The MXP_MR_2.5G and MXPP_MR_2.5G cards have several safety labels that provide laser radiation
and electrical shock warnings.
Figure 16-68 shows the laser radiation warning hazard level label. The faceplate of these cards are
clearly labeled with warnings about the equipment radiation level. Personnel must understand all
warning labels before working with these cards. The hazard level label warns the personnel against
exposure to laser radiation of Class 1M limits calculated in accordance with IEC60825-1 Ed.1.2.
SFP 1
SFP 6
SFP 5
SFP 4
SFP 3
SFP 2
SFP 8
SERDES
FPGA
(for
FC,
GE,
FICON,
PCS,
B2B,
GFP-T)
SERDES
SFP 7
High-speed
SERDES
QDR
SRAM
TADM
framer
Laser
APD
Serializer
Deserializer
Client
Interfaces
GE, FC, FICON
GE, FC, FICON
Trunk
interface
124076
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