400G transceivers are high-speed optical modules used in data centers and network infrastructures to handle large volumes of data traffic. There are several types of 400G transceivers, each designed to meet different requirements and standards. Here are some of the main types:
| Transmission Type | QSFP-DD Product Description | Reach | Optical Connector | Wavelength | Optical Modulation | Protocol |
|---|---|---|---|---|---|---|
| Multimode fiber | 400G QSFP-DD SR8 |
up to 100m over OM4 up to 70m over OM3 |
MPO-16 | 850nm | 50G PAM4 | IEEE 802.3cd |
| 400G QSFP-DD SR4.2 |
up to 150m over OM5 up to 70m over OM3 |
MPO-12 | 850nm | 50G PAM4 | IEEE 802.3 | |
| Single-mode fiber | 400G QSFP-DD DR4 |
up to 500m over parallel SMF |
MPO-12 |
1310nm |
50G PAM4 |
IEEE 802.3bs |
| 400G QSFP-DD 4x 100G-DR | up to 500m over parallel SMF | MPO-12 | 1310nm |
50G PAM4 |
IEEE 802.3bs |
|
| 400G QSFP-DD XDR4/DR4+ |
up to 2km over parallel SMF |
MPO-12 |
1310nm |
50G PAM4 |
IEEE 802.3bs |
|
| 400G QSFP-DD FR4 |
up to 2km over parallel SMF |
LC |
CWDM4 wavelength |
50G PAM4 |
100G Lambda MSA |
|
| 400G QSFP-DD 4x 100G-FR | up to 2km over parallel SMF | MPO-12 | 1310nm | 50G PAM4 | IEEE Std 802.3 | |
| 400G QSFP-DD LR4L | up to 6km over parallel SMF | LC | 1310nm | 50G PAM4 |
IEEE 802.3bs | |
|
400G QSFP-DD 4x 100G-LR
|
up to 10km over parallel SMF
|
MPO-12
|
1310nm
|
50G PAM4
|
IEEE 802.3cu
|
|
| 400G QSFP-DD LR4 | up to 10km over parallel SMF | LC | CWDM4 wavelength | 50G PAM4 | 100G Lambda MSA | |
| 400G QSFP-DD LR8 | up to 10km over parallel SMF | LWDM wavelength | CWDM4 wavelength | 50G PAM4 | IEEE 802.3bs | |
| 400G QSFP-DD ER8 | up to 40km over parallel SMF | LWDM wavelength | 1310nm | 50G PAM4 | IEEE 802.3cn |
FAQs About Walsun 400G Transceivers
Q: What are the benefits that Walsun 400G transceivers can offer?
A: Walsun 400G transceivers help cloud operators, service providers, and enterprises to achieve higher bandwidth at lower cost and power per gigabit. Key benefits of Walsun 400G transceivers include:
- With both OSFP and QSFP-DD form factors to meet your diverse needs of ramping up to 400G transmission.
- SiPh-based technology used on some Walsun 400G transceivers for lower power & cost and higher density.
- Compliant with QSFP-DD MSA and IEEE 802.3bs, and tested in host devices for proven interoperability, superior performance, quality, and reliability.
- Compatible with mainstream brands such as Cisco, Juniper, Arista, Dell, Mellanox, etc.
- Simplify your network by reducing the number of optical fiber links, connectors and patch panels by a factor of 4.
Q: What are the application scenarios of Walsun 400G transceivers?
A: 400G QSFP-DD transceiver modules are the backbone of high-performance 400G networks. Walsun 400G transceivers can be used in various scenarios. Generally speaking, it depends on the connection distance you want to cover. For example, you can use 400G DAC and AOC cables for short-reach connections between ToR switch and server. For 2km to 10km data center interconnection connections, QSFP-DD FR4 or LR4 modules are better high-quality and economical choices.
Q: What quality certifications do you have for your 400G transceivers?
A: Walsun 400G transceivers accord with a range of certifications for optical transceivers including ISO 9001:2015, RoHS, REACH, CB, RCM, FCC, and Russian TR CU certificate (EAC Certificate). Rest assured that our products will meet essential quality and safety requirements.
Q: What does “SR8”, “DR4”, “XDR4”, “FR4”, “LR4”, and “LR8” mean in QSFP 400G modules?
A: “SR” refers to short-range, and “8” implies there are 8 optical channels. “DR” refers to 500m reach using single-mode fiber, and “4” implies there are 4 optical channels. “XDR4” is short for “eXtended reach DR4”. And “LR” refers to 10km reach using single-mode fiber.
Q: Can I plug a QSFP-DD transceiver module into an OSFP port?
A: No. QSFP-DD and OSFP are totally different form factors. For more information about OSFP transceivers, you can refer to the 400G OSFP Transceiver Types Overview. You can use only one kind of form factor in the corresponding system. Eg, if you have a QSFP 400G system, QSFP-DD transceivers and cables must be used.
Q: Can I plug a 100G QSFP28 module into a 400G QSFP port?
A: Yes. A QSFP28 module can be inserted into a QSFP-DD port (without a mechanical adapter). When using a QSFP28 module in a QSFP-DD port, the QSFP-DD port must be configured for a data rate of 100G instead of 400G.
Q: What other breakout options are possible apart from using the 400G QSFP-DD modules mentioned above?
A: 400G QSFP-DD DACs & AOCs are possible for breakout 400G connections. See 400G Direct Attach Cables (DAC & AOC) Overview for more information about 400G DACs & AOCs.
Q: Cosa devo fare se non so quale modulo è il più adatto per me?
A: Our dedicated customer support offers 24/7 technical assistance. If you have any questions about our transceiver modules, such as how to select the right 400G optical transceiver for your switches, how to choose between different form factors, what to do when typical technical glitches occur, or how to place an order, don’t hesitate to contact our tech support.
Q: Can I return the product or get a refund?
A: Walsun wants you to be thrilled with our 400G transceiver modules. However, if you need to return an item or ask to get a refund, we’re here to help. For all 400G transceiver modules, DAC & AOC cables, and breakout cables, you have 30 calendar days to return an item from the date you received it, which means the request must be submitted within the return/exchange window. Refunds will be processed after Walsun receives and inspects the returned items.
