Cisco ONS 15454 DWDM - Page 747

A-55
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Appendix A Hardware Specifications
A.9.4 MXP_MR_2.5G and MXPP_MR_2.5G Card Specifications
– Mixed configurations up to maximum line rate of 2.5 Gbps (for example, if you have a port
configured for FC2G, you cannot use another port at the same time). See the
“8.9 MXP_MR_2.5G and MXPP_MR_2.5G Cards” section on page 8-44 for more information
on mixed-mode operation.
• Client ports: 8x SFP
• Performance monitoring (PM) for all interfaces
• Buffer-to-buffer credit management for distance extension
• Line (trunk side)
– Bit rate: 2.488 Gbps for OC-48/STM-16
– Code: Scrambled NRZ
– Fiber: 1550-nm single-mode
– Maximum chromatic dispersion allowance: 6000 ps/nm
– Loopback modes: Terminal and facility
Caution 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
• Transmitter (trunk side)
– 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
– Transmitter maximum return reflectance: –27 dB
– Chromatic dispersion allowance: 5400 ps/nm, giving an optical power penalty < 2.0 dB
– Minimum side mode suppression ratio: 30 dB
– Transmitter is a direct modulated laser
– Wavelength stability (drift): +/– 25 picometers (pm)
Note An optical device on the card keeps the laser wavelength locked as closely as possible to the ITU nominal
value. The allowed drift is +/– 25 pm.
• Currently available wavelengths of the TXP_MR_2.5G and TXPP_MR_2.5G cards (eight card
versions):
– ITU grid blue band: 1530.334 to 1544.526 nm (four card versions, four wavelengths each)
– ITU grid red band: 1546.119 to 1560.606 nm (four card versions, four wavelengths each)
• Receiver (trunk side, see Table A-33)