The QSFP 40G-SR4 module supports data transmission rates of 10.3125 Gbit/s per lane over 4 lanes of multi-mode fiber, allowing maximum link lengths of 100m on OM3 fiber and 150m on OM4 fiber. It uses vertical cavity surface emitting lasers operating at 850nm and requires MTP/MPO cabling. The module can also be used in a 4x10G mode to interconnect with 10G-SR interfaces at the same distance specifications.

1. https://www.cbo-it.de/de/produkte/blueoptics/transceiver/qsfp.html

2. 40GBASE-SR4 ("short
range") is a port type for
multi-mode fiber and uses
850nm lasers. It's used for
short range fiber connection.
Its Physical Coding Sublayer
64b/66b PCS is defined in
IEEE 802.3 Clause 82 and its
Physical Medium Dependent
PMD in Clause 86.

3. It uses four lanes of multi-
mode fiber delivering
serialized data at a rate of
10.3125 Gbit/s per lane.
40GBASE-SR4 has a reach of
100 m on OM3 and 150m on
OM4.
There is a longer range variant
40G-eSR4 with a reach of 300 m
on OM3 and 400 m on OM4.
This extended reach is
equivalent to the reach of 10G-
SR.

4. The QSFP 40G-SR4 module supports link lengths of
100 meters and 150 meters, respectively, on laser-
optimized OM3 and OM4 multi-mode fibers. It
requires special MTP/MPO cabling.

5. Product details about 40G-SR4 QSFP+ transceivers
4-lanes in 850 nm vertical cavity surface emitting laser
Electrically hot-pluggable and easy for ease of insertion
and extraction
Supports diagnostic features, providing real-time
monitoring of transmitted optical power
Received optical power, laser bias current, temperature,
supply voltage
Industry-standard MTP (MPO) 1x8 or 1x12 ribbon cable
connector
Maximum link lengths of 100m on OM3 multi-mode
fiber; 150m link lengths on OM4 multi-mode fiber
Case operating temperature range: 0 to 70 centigrade(32
to 158 Fahrenheit)Compliant with QSFP+ MAS

6. 40G-SR4 QSFP module can also be
used in a 4x10G mode for
interoperability with 10G-SR
interfaces up to 100 and 150 meters
on OM3 and OM4 fibers,
respectively.

7. The 4x10G mode operation is enabled by the optimization
of the transmit and receive optical characteristics of the
QSFP-40G-SR4 to prevent receiver overload or unnecessary
triggering of alarm thresholds on the 10GBASE-SR receiver,
and at the same time is completely interoperable with all
standard 40G-SR4 interfaces.

8. The 4x10G connectivity is achieved using an external 12-fiber parallel to
2-fiber duplex breakout cable (LC-LC Duplex 10G OM4 MM), which
connects the 40G-SR4 module to four 10GBASE-SR SFP+ MMF. This
connectivity can also be achieved using an 8-fiber OM4 to 12 strands
MTP harness cable.

9. This QSFP-40G-SR4 is optimized to guarantee interoperability with any
IEEE 40G-SR4 and 10G-SR (in 4x10G mode). Besides, we have a test
center with professionally trained staff, advanced test facilities and
comprehensive original-brand switches, to ensure our customers to
receive the optics with superior quality.

10. CBO Germany
Friedhofstraße 23
45478 Muelheim an der Ruhr
Germany
Tel: 0049 - 208 - 777 247 - 0
Fax: 0049 - 208 - 777 247 - 99
eMail: info@cbo-it.de
https://www.cbo-it.de/de/produkte/blueoptics/transceiver/qsfp.html