Client Interfaces - Cisco ONS 15454 DWDM Reference Manual

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Transponder and Muxponder Cards

(10GBASE-LR)

(short reach/intra-office)

(intermediate range)

optics modules

8.7.6 Client Interfaces

The MXP_2.5G_10E provides four intermediate- or short-range OC-48/STM-16 ports per card on the

client side. Both SR-1 or IR-1 optics can be supported and the ports use SFP connectors. The client

interfaces use four wavelengths in the 1310-nm, ITU 100-MHz-spaced, channel grid.

8.7.6.1 DWDM Interface

The MXP_2.5G_10E serves as an OTN multiplexer, transparently mapping four OC-48 channels

asynchronously to ODU1 into one 10-Gbps trunk. The DWDM trunk is tunable for transmission over

four wavelengths in the 1550-nm, ITU 100-GHz spaced channel grid.

You must use a 20-dB fiber attenuator (15 to 25 dB) when working with the MXP_2.5G_10E card in a

loopback on the trunk port. Do not use direct fiber loopbacks with the MXP_2.5G_10E card. Using

direct fiber loopbacks causes irreparable damage to the MXP_2.5G_10E card.

8.7.7 Multiplexing Function

The muxponder is an integral part of the reconfigurable optical add/drop multiplexer (ROADM)

network. The key function of MXP_2.5G_10E is to multiplex 4 OC-48/STM16 signals onto one ITU-T

G.709 OTU2 optical signal (DWDM transmission). The multiplexing mechanism allows the signal to be

terminated at a far-end node by another MXP_2.5G_10E card.

Termination mode transparency on the muxponder is configured using OTUx and ODUx OH bytes. The

ITU-T G.709 specification defines OH byte formats that are used to configure, set, and monitor frame

alignment, FEC mode, section monitoring, tandem connection monitoring, and termination mode

transparency.

MXP_2.5G_10E Block Diagram

Cisco ONS 15454 DWDM Reference Manual, R8.5

8.7.6 Client Interfaces

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