B-4
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-07
Appendix B Transceivers and Module Connectors
40-Gigabit QSFP Transceivers
40-Gigabit QSFP Transceivers
The 40-Gigabit QSFP transceivers are used with the M2-Series 40-Gigabit Ethernet I/O module
(N7K-M206FQ-23L).
Figure B-3 identifies the major features of these transceivers. For the cable specifications that apply to
these transceivers, see Table B-7. For the optical specifications, see Table B-8. For the environmental
specifications, see Table B-9.
Table B-4 Cable Specifications for the CFP Transceivers
Transceiver
Cable
Type Connector Type
Wavelength
(nm)
Core Size
(microns)
Modal
Bandwidth
(MHz-km)
Maximum Cable
Distance
CFP-40G-SR4 MMF Dual SC/PC 850 50.0
50.0
50.0
500 (OM2)
2000 (OM3)
4700 (OM4)
98.4 feet (30 m)
328.1 feet (100 m)
492.1 feet (150 m)
CFP-40G-LR4 SMF Dual SC/PC 1310 G.652 — 32.8 feet (10 km)
Table B-5 CFP Transceiver Optical Transmit and Receive Specifications
Product Number Transceiver Type Transmit Power (dBm) Receive Power (dBm)
Transmit and Receive Wavelength
(nm)
CFP-40G-SR4 40GBASE CFP 2.4 (maximum per lane)
-7.6 (minimum per lane)
2.4 (maximum per lane)
-9.5 (minimum per lane)
Four lanes: 840 to 860 nm
CFP-40G-LR4 40GBASE CFP 2.3 (maximum per lane)
-7 (minimum per lane)
2.3 (maximum per lane)
-13.7 (minimum per lane)
Four lanes: 1271 nm, 1291 nm,
1311 nm, and 1331 nm
Table B-6 Environmental and Power Specifications for CFP Transceivers
Parameter Specification
Storage temperature –40 to 185°F (–40 to 85°C)
Operating temperature 32 to 158°F (0 to 70°C)
Case temperature –40 to 158°F (–40 to 70°C)
Storage relative humidity 5 to 95 percent
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