Cisco ONS 15454 DWDM Installation And Operation Manual page 913

Appendix B Hardware Specifications
Client ports: 8x SFP
•
• Performance monitoring (PM) for all interfaces
• Buffer-to-buffer credit management for distance extension
Line (trunk side)
•
Caution
Transmitter (trunk side)
•
An optical device on the card keeps the laser wavelength locked as closely as possible to the ITU nominal
Note
value. The allowed drift is +/- 25 pm.
Currently available wavelengths of the TXP_MR_2.5G and TXPP_MR_2.5G cards:
•
ITU grid blue band: 1530.334 to 1544.526 nm
ITU grid red band: 1546.119 to 1560.606 nm
Receiver (trunk side)
•
April 2006
– Mixed configurations up to maximum line rate (for example, if you have a port configured for
2G FC, you cannot use another port at the same time)
Bit rate: 2.488 Gbps for OC-48/STM-16
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Code: Scrambled NRZ
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Fiber: 1550-nm single-mode
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Maximum chromatic dispersion allowance: 6000 ps/nm
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Loopback modes: Terminal and facility
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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 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.
Connectors: LC
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Compliance: Telcordia GR-253-CORE, Telcordia GR-2918-CORE, Issue 2, ITU-T G.957, and
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ITU-T 100-GHz grid standard G.692
Transmit power: +3 +/–1 dBm with MXP_MR_2.5G card, and +/–1 dBm with
–
MXPP_MR_2.5G card
50-GHz DWDM migration ready (the wavelength deviation is less than +/–0.040 nm through
–
wavelocker deployment)
Four-channel wavelength tunability at 100-GHz spacing
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Transmitter maximum return reflectance: –27 dB
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Chromatic dispersion allowance: 5400 ps/nm, giving an optical power penalty < 2.0 dB
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Minimum side mode suppression ratio: 30 dB
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– Transmitter is a direct modulated laser
Wavelength stability (drift): +/- 25 picometers (pm)
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Receiver sensitivity –28 dBm, BER 1 * 10 exp – 12
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Receiver overload is equal to or exceeds –8 dBm
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B.5.4 MXP_MR_2.5G and MXPP_MR_2.5G Card Specifications
Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7
B-37