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Cisco ONS 15454 DWDM Reference Manual, R8.5
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Chapter 8 Transponder and Muxponder Cards
8.7.4 MXP_2.5G_10E Card
The MXP_2.5G_10E works with optical transport network (OTN) devices defined in ITU-T G.709. The
card supports ODU1 to OTU2 multiplexing, an industry standard method for asynchronously mapping
a SONET/SDH payload into a digitally wrapped envelope. See the “8.7.7 Multiplexing Function”
section on page 8-31.
The MXP_2.5G_10E card is not compatible with the MXP_2.5G_10G card, which does not support full
transparent termination. You can install MXP_2.5G_10E cards in Slots 1 to 6 and 12 to 17. You can
provision this card in a linear configuration, as a BLSR/MS-SPRing, a path protection/SNCP, or a
regenerator. The card can be used in the middle of BLSR/MS-SPRing or 1+1 spans when the card is
configured for transparent termination mode.
The MXP_2.5G_10E features a 1550-nm laser on the trunk port and four 1310-nm lasers on the client
ports and contains five transmit and receive connector pairs (labeled) on the card faceplate. The card uses
a dual LC connector on the trunk side and uses SFP modules on the client side for optical cable
termination. The SFP pluggable modules are short reach (SR) or intermediate reach (IR) and support an
LC fiber connector.
Note When you create a 4xOC-48 OCHCC circuit, you need to select the G.709 and Synchronous options. A
4xOC-48 OCHCC circuit is supported by G.709 and synchronous mode. This is necessary to provision
a 4xOC-48 OCHCC circuit.
8.7.4.1 Key Features
The MXP_2.5G_10E card has the following high level features:
• Four 2.5 Gbps client interfaces (OC-48/STM-16) and one 10 Gbps trunk. The four OC-48 signals
are mapped into a ITU-T G.709 OTU2 signal using standard ITU-T G.709 multiplexing.
• Onboard E-FEC processor: The processor supports both standard Reed-Solomon (RS, specified in
ITU-T G.709) and E-FEC, which allows an improved gain on trunk interfaces with a resultant
extension of the transmission range on these interfaces. The E-FEC functionality increases the
correction capability of the transponder to improve performance, allowing operation at a lower
OSNR compared to the standard RS (237,255) correction algorithm. A new block code (BCH)
algorithm implemented in E-FEC allows recovery of an input BER up to 1E-3.
• Pluggable client interface optic modules: The MXP_2.5G_10E card has modular interfaces. Two
types of optics modules can be plugged into the card. These include an OC-48/STM 16 SR-1
interface with a 7-km (4.3-mile) nominal range (for short range and intra-office applications) and an
IR-1 interface with a range up to 40 km (24.9 miles). SR-1 is defined in Telcordia GR-253-CORE
and in I-16 (ITU-T G.957). IR-1 is defined in Telcordia GR-253-CORE and in S-16-1
(ITU-T G.957).
• High level provisioning support: The MXP_2.5G_10E card is initially provisioned using
Cisco TransportPlanner software. Subsequently, the card can be monitored and provisioned using
CTC software.
• Link monitoring and management: The MXP_2.5G_10E card uses standard OC-48 OH (overhead)
bytes to monitor and manage incoming interfaces. The card passes the incoming SDH/SONET data
stream and its overhead bytes transparently.
• Control of layered SONET/SDH transport overhead: The card is provisionable to terminate
regenerator section overhead. This is used to eliminate forwarding of unneeded layer overhead. It
can help reduce the number of alarms and help isolate faults in the network.
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