ApflwpcylSpec score 9.5
400 Speed, Single-mode fiber, 1550 nm
+400 Gbps speed
+Reaches up to 80 km over single-mode fiber
+1550 nm wavelength for long-haul links
−Requires single-mode fiber
$7,115.82
as of 11/04/2026 10:09 PST - DetailsProduct details
Spec score9.5
Pros+400 Gbps speed
+Reaches up to 80 km over single-mode fiber
+1550 nm wavelength for long-haul links
+QSFP-DD form factor
Cons−Requires single-mode fiber
Compared with the 14 Network Transceivers on this page+80000 reach or length: the highest reach or length of the 9 here
+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
CompufoxSpec score 8.9
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for very high-bandwidth links
+40 km reach over single-mode fiber
+1310 nm wavelength for long-haul single-mode links
−Single-mode fiber only, no multimode support
$9,799.00
as of 11/04/2026 03:09 PST - DetailsProduct details
Spec score8.9
Pros+400 Gbps speed for very high-bandwidth links
+40 km reach over single-mode fiber
+1310 nm wavelength for long-haul single-mode links
+LC connector with DOM monitoring
Cons−Single-mode fiber only, no multimode support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
+40000 reach or length: only 1 of 9 here have a higher reach or length
How pros and cons are picked (About: Disclaimer) About this product
Kinbzq
QSFP56+, 400 Speed, Single-mode fiber
+Delivers 400 Gbps speed
+Uses single-mode fiber for long-haul links
+QSFP-DD coherent design for high-speed links
−QSFP56+ form factor listed alongside QSFP-DD name, which may not match
$5,636.00
as of 11/04/2026 10:09 PST - DetailsProduct details
Pros+Delivers 400 Gbps speed
+Uses single-mode fiber for long-haul links
+QSFP-DD coherent design for high-speed links
Cons−QSFP56+ form factor listed alongside QSFP-DD name, which may not match
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
CompufoxSpec score 8.9
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for very high-bandwidth links
+40 km reach over single-mode fiber
+1310 nm wavelength for long-haul single-mode links
−Single-mode fiber only, no multimode support
$9,799.00
as of 11/04/2026 06:06 PST - DetailsProduct details
Spec score8.9
Pros+400 Gbps speed for very high-bandwidth links
+40 km reach over single-mode fiber
+1310 nm wavelength for long-haul single-mode links
+LC connector with DOM monitoring
Cons−Single-mode fiber only, no multimode support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
+40000 reach or length: only 1 of 9 here have a higher reach or length
How pros and cons are picked (About: Disclaimer) About this product
CompufoxSpec score 8.4
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
−Single-mode fiber only, no multimode support
$7,599.00
as of 11/04/2026 06:07 PST - DetailsProduct details
Spec score8.4
Pros+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
+LC connector with DOM monitoring
Cons−Single-mode fiber only, no multimode support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
CompufoxSpec score 8.4
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
−Single-mode fiber only, no multimode support
$7,599.00
as of 11/04/2026 06:07 PST - DetailsProduct details
Spec score8.4
Pros+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
+LC connector with DOM monitoring
Cons−Single-mode fiber only, no multimode support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
CompufoxSpec score 8.4
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
−Single-mode fiber only, no multimode support
$7,599.00
as of 11/04/2026 06:06 PST - DetailsProduct details
Spec score8.4
Pros+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
+LC connector with DOM monitoring
Cons−Single-mode fiber only, no multimode support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
CompufoxSpec score 8.4
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
−Single-mode fiber only, no multimode support
$7,599.00
as of 11/04/2026 06:06 PST - DetailsProduct details
Spec score8.4
Pros+400 Gbps speed for very high-bandwidth links
+10 km reach over single-mode fiber
+1310 nm wavelength for single-mode links
+LC connector with DOM monitoring
Cons−Single-mode fiber only, no multimode support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
RiteAVSpec score 8.3
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed in QSFP-DD form factor
+Listed 1310 nm wavelength
+Cisco-compatible design with DOM monitoring
−Reach limited to 500 m
$7,200.00
as of 11/04/2026 06:06 PST - DetailsProduct details
Spec score8.3
Pros+400 Gbps speed in QSFP-DD form factor
+Listed 1310 nm wavelength
+Cisco-compatible design with DOM monitoring
Cons−Reach limited to 500 m
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
−500 reach or length: 8 of the 9 here have a higher reach or length
How pros and cons are picked (About: Disclaimer) CompufoxSpec score 8.9
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed for high-capacity links
+Uses LC connector
+1310 nm wavelength
$7,500.00
as of 11/04/2026 06:07 PST - DetailsProduct details
Spec score8.9
Pros+400 Gbps speed for high-capacity links
+Uses LC connector
+1310 nm wavelength
+Lists DOM monitoring support
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
+40000 reach or length: only 1 of 9 here have a higher reach or length
How pros and cons are picked (About: Disclaimer) About this product
Axiom
QSFP56+, 400 Speed, Single-mode fiber
+400 Gbps speed for very high-bandwidth links
+QSFP56+ form factor for dense port layouts
+Single-mode fiber medium for longer-distance links
$7,165.15
as of 11/04/2026 06:06 PST - DetailsProduct details
Pros+400 Gbps speed for very high-bandwidth links
+QSFP56+ form factor for dense port layouts
+Single-mode fiber medium for longer-distance links
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
Axiom
QSFP56+, 400 Speed, Single-mode fiber
+400 Gbps speed for very high-bandwidth links
+QSFP56+ form factor for dense port layouts
+Single-mode fiber medium for longer-distance links
$17,773.03
as of 11/04/2026 06:06 PST - DetailsProduct details
Pros+400 Gbps speed for very high-bandwidth links
+QSFP56+ form factor for dense port layouts
+Single-mode fiber medium for longer-distance links
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
Generic
400 Speed, Single-mode fiber, 1550 nm
+Tunable transceiver for 400G single-mode links
+Rated for 400 Gbps data speed
+Operates at 1550 nm wavelength
$7,063.00
as of 11/04/2026 10:10 PST - DetailsProduct details
Pros+Tunable transceiver for 400G single-mode links
+Rated for 400 Gbps data speed
+Operates at 1550 nm wavelength
+Reaches up to 400 kilometers on single-mode fiber
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
Nicgqmqr
QSFP56+, 400 Speed, Single-mode fiber
+400 Gbps speed for very high-bandwidth links
+Single-mode fiber suits long-distance coherent links
+Coherent DCO design for 400G-ZR use
$5,636.00
as of 11/04/2026 10:09 PST - DetailsProduct details
Pros+400 Gbps speed for very high-bandwidth links
+Single-mode fiber suits long-distance coherent links
+Coherent DCO design for 400G-ZR use
Compared with the 14 Network Transceivers on this page+400 speed: the highest speed of the 14 here
How pros and cons are picked (About: Disclaimer) About this product
APFLWPCYL QDD-400G-ZRP-S QDD 400G 1550nm 80km Single-Mode Optical Module Optical Transceiver
