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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.8.3 TXP_MR_2.5G and TXPP_MR_2.5G Cards
For 2R operation mode, the TXP_MR_2.5G and TXPP_MR_2.5G cards have the ability to pass data
through transparently from client side interfaces to a trunk side interface, which resides on an ITU grid.
The data might vary at any bit rate from 200-Mbps up to 2.38-Gbps, including ESCON and video signals.
In this pass-through mode, no performance monitoring (PM) or digital wrapping of the incoming signal
is provided, except for the usual PM outputs from the SFPs. Similarly, this card has the ability to pass
data through transparently from the trunk side interfaces to the client side interfaces with bit rates
varying from 200-Mbps up to 2.38-Gbps. Again, no performance monitoring or digital wrapping of
received signals is available in this pass-through mode.
For 3R operation mode, the TXP_MR_2.5G and TXPP_MR_2.5G cards apply a digital wrapper to the
incoming client interface signals (OC-N/STM-N, 1G-FC, 2G-FC, GE). Performance monitoring is
available on all of these signals except for 2G-FC, and varies depending upon the type of signal. For
client inputs other than OC-48/STM-16, a digital wrapper might be applied but the resulting signal is not
ITU-T G.709 compliant. The card applies a digital wrapper that is scaled to the frequency of the input
signal.
The TXP_MR_2.5G and TXPP_MR_2.5G card has the ability to take digitally wrapped signals in from
the trunk interface, remove the digital wrapper, and send the unwrapped data through to the client
interface. Performance monitoring of the ITU-T G.709 OH and SONET/SDH OH is implemented.
16.8.3.1 Faceplate
Figure 16-56 shows the TXP_MR_2.5G and TXPP_MR_2.5G faceplates.
Table 16-55 Trunk Bit Rates With ITU-T G.709 Enabled
Client Interface ITU-T G.709 Disabled ITU-T G.709 Enabled
OC-48/STM-16 2.488 Gbps 2.66 Gbps
2G-FC 2.125 Gbps 2.27 Gbps
GE 1.25 Gbps 1.34 Gbps
1G-FC 1.06 Gbps 1.14 Gbps
OC-12/STM-3 622 Mbps 666.43 Mbps
OC-3/STM-1 155 Mbps 166.07 Mbps
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