Cisco QSFP-40G-SR4= Scheda Tecnica
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Cisco QSFP-40G-CSR4
The Cisco 40GBASE-CSR4 QSFP+ Module is similar to the 40GBASE-SR4 interface extends supported link
lengths to 300m and 400m respectively on laser-optimized OM3 and OM4 multimode fiber cables. Each 10-gigabit
lane of this module is compliant to IEEE 10GBASE-SR specifications. This module can be used for native 40G
optical links over 12-fiber ribbon cables with MPO/MTP connectors, or in 4x10G mode with ribbon to duplex fiber
breakout cables for connectivity to four 10GBASE-SR interfaces. Maximum channel insertion loss allowed is
respectively 2.6dB over 300m of OM3 cable or 2.9dB over 400m of OM4 cable.
Cisco QSFP-40GE-LR4
The Cisco 40GBASE-LR4 QSFP+ Module (Figure 2) supports link lengths of up to 10km over a standard pair of
G.652 single-mode fiber with duplex LC connectors. The 40 Gigabit Ethernet signal is carried over four
wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.
Figure 2. Cisco 40GBASE-LR4 QSFP+ Module
Cisco QSFP+ to Four SFP+ Copper Breakout Cables
Cisco QSFP+ to four SFP+ copper direct-attach breakout cables (Figure 3) are suitable for very short distances
and offer a highly cost-effective way to connect within racks and across adjacent racks. These breakout cables
connect to a 40G QSFP+ port of a Cisco switch on one end and to four 10G SFP+ ports of a Cisco switch on the
other end. Cisco currently offers passive cables in lengths of 1, 3 and 5 meters, and active cables in lengths of 7
and 10 meters.