Техническая Спецификация для Cisco Cisco DWDM Transceiver Modules
© 2014 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 2 of 4
Cisco QSFP-40G-SR4-S
The Cisco 40GBASE-SR4 QSFP module supports link lengths of 100 and 150 meters, respectively, on laser-
optimized OM3 and OM4 multimode fibers. It primarily enables high-bandwidth 40G optical links over 12-fiber
parallel fiber terminated with MPO/MTP multifiber connectors. Cisco QSFP-40G-SR4-S is optimized to guarantee
interoperability with any IEEE-compliant 40GBase-SR4 module.
Cisco QSFP-40G-LR4-S
The Cisco 40GBASE-LR4 QSFP module supports link lengths of up to 10 kilometer over a standard pair of G.652
single-mode fiber with duplex LC connectors. The QSFP-40G-LR4-S module supports 40GBase Ethernet rate only.
The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four
wavelengths are managed in the device.
Technical Specifications
Following are the technical specifications for platform support, and connectors and cabling.
Platform Support
Cisco QSFP modules are supported on Cisco switches. For more details, refer to the document “
”
Connectors and Cabling
See Table 2 for connector type information and cabling specifications for each QSFP product.
Note: Only connections with patch cords with PC or ultra-physical contact (UPC) connectors are supported.
Patch cords with angled physical contact (APC) connectors are not supported. All cables and cable assemblies
used must be compliant with the standards specified in the standards section of this data sheet.
Table 2.
QSFP Port Cabling Specifications
Cisco QSFP
Wavelength
(nm)
(nm)
Cable Type
Core Size
(Microns)
(Microns)
Modal
Bandwidth
(MHz
Bandwidth
(MHz
*
km)
*
3
Cable
Distance
Distance
*
1
Power
Consumption
(W)
Consumption
(W)
Pull Tab
Color
Color
Cisco QSFP-40G-SR4-S
850
MMF
50.0
50.0
2000 (OM3)
4700 (OM4)
100m
150m
*
2
1.5
Beige
Cisco QSFP-40G-LR4-S
1310
SMF
G.652
-
10km
3.5
Blue
*
1 Minimum cabling distance is 0.5 meters for -SR4 and -CSR4 modules and 2 meters for -LR4 according to the IEEE 802.3
standard.
*
2 Considered an engineered link with maximum 1 decibel loss budget.
*
3 Specified at transmission wavelength.
Table 3 shows the key optical characteristics for the Cisco QSFP modules.
Table 3.
Optical Characteristics
Product
Type
Transmit Power (dBm)
*
5 Receive Power (dBm)
*
5
Transmit and Receive
Wavelength (nm)
Wavelength (nm)
Maximum
Minimum
Maximum
Minimum
Cisco QSFP-40G-SR4-S
40GBASE-SR4,
4 lanes, 850 nm MMF
4 lanes, 850 nm MMF
2.4, per
lane
lane
-7.6, per
lane
lane
2.4, per
lane
lane
-9.5, per
lane
lane
840 to 860
Cisco QSFP-40G-LR4-S
40GBASE-LR4, 1310
nm, SMF
nm, SMF
2.3, per
lane
lane
-7, per lane
2.3, per
lane
lane
-13.7, per
lane
lane
Four lanes: 1271, 1291, 1311,
1331
1331
*
5 Transmitter and receiver power is average, unless specified.