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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.8.2 TXP_MR_10E Card
Caution
You must use a 15-dB fiber attenuator (10 to 20 dB) when working with the TXP_MR_10E card in a
loopback on the trunk port. Do not use direct fiber loopbacks with the TXP_MR_10E card. Using direct
fiber loopbacks causes irreparable damage to the TXP_MR_10E card.
16.8.2.3 Client Interface
The client interface is implemented with a separately orderable XFP module. The module is a tri-rate
transceiver, providing a single port that can be configured in the field to support an OC-192 SR-1
(Telcordia GR-253-CORE) or STM-64 I-64.1 (ITU-T G.691) optical interface, as well as 10GE LAN
PHY (10GBASE-LR), 10GE WAN PHY (10GBASE-LW), or 10G FC signals.
The client side XFP pluggable module supports LC connectors and is equipped with a 1310-nm laser.
16.8.2.4 DWDM Trunk Interface
On the trunk side, the TXP_MR_10E card provides a 10-Gbps STM-64/OC-192 interface. There are four
tunable channels available in the 1550-nm band or eight tunable channels available in the 1580-nm band
on the 50-GHz ITU grid for the DWDM interface. The TXP_MR_10E card provides 3R transponder
functionality for this 10-Gbps trunk interface. Therefore, the card is suited for use in long-range
amplified systems. The DWDM interface is complaint with ITU-T G.707, ITU-T G.709, and Telcordia
GR-253-CORE standards.
The DWDM trunk port operates at a rate that is dependent on the input signal and the presence or absence
of the ITU-T G.709 Digital Wrapper/FEC. The possible trunk rates are:
•
OC192 (9.95328 Gbps)
•
OTU2 (10.70923 Gbps)
•
10GE (10.3125 Gbps) or 10GE into OTU2 (nonstandard 11.0957 Gbps)
•
10G FC (10.51875 Gbps) or 10G FC into OTU2 (nonstandard 11.31764 Gbps).
The maximum system reach in filterless applications without the use of optical amplification or
regenerators is nominally rated at 23 dB over C-SMF fiber. This rating is not a product specification, but
is given for informational purposes. It is subject to change.
16.8.2.5 Y-Cable Protection
The TXP_MR_10E card supports Y-cable protection, which provides transponder equipment protection
without client terminal equipment interface protection. A single client interface can be split between two
transponder cards using a Y-protection device.
With Y-cable protection, two TXP_MR_10E transponder cards can be joined in a Y-cable protection
group. In Y-cable protection, the client ports of the two cards are joined by Y cables. An incoming client
signal is injected into the Rx Y-cable port and is split between the two TXP_MR_10E cards (connected
to Rx client ports) in the protection group. The Tx client signals from the two protection group
TXP_MR_10E cards are connected to the correspondent ports of the Tx Y cable. Only the Tx client port
of the active TXP_MR_10E card is turned on and transmits the signal towards the receiving client
equipment. See the
“16.9.1 Y-Cable Protection” section on page 16-114
for more details.
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