HPE Aruba JL485A Compatible 25G SFP28 ESR Transceiver Module (850nm MMF 200m/OM3 300m/OM4 LC DDM)
The 25G SFP28 ESR transceivers are high-performance, cost-effective modules supporting a data rate of 25.78 Gbps over multimode fiber. The transceiver consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA), and an MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement and SFF-8472 digital diagnostics functions.
Product Details
| HPE (Aruba) Compatible | JL485A | Brand | Walsun |
| Form Factor | SFP28 | Max Data Rate | 25 Gbps |
| Wavelength | 850nm | Max Distance | 200m over OM3 / 300m over OM4 |
| Connector | Duplex LC | Transmitter Type | 850nm |
| Cable Type | MMF | Receiver Type | PIN |
| TX Power | -8.4~+2.4dBm | Receiver Sensitivity | < -11.9dBm |
| Protocols | MSA Compliant | Operation Temperature | 0 to 70°C (32 to 158°F) |
25G SFP28 Transceiver Type and Applications
Following are the main categories of 25G SFP28 transceivers: 25G SFP28 standard transceiver, 25G BiDi SFP28 transceiver, and 25G WDM SFP28 transceiver.
| Category | Type | Reach | Cable Type | Application |
|---|---|---|---|---|
| 25G standard SFP28 transceiver | 25G SR | 100m | OM4 MMF | 25GBASE-SR Ethernet |
| 25G LR | 100m | SMF | Data Center Backbone; High-speed Servers | |
| 25G ER | 40km | SMF | High-speed storage area networks; CPRI 10 | |
| 25G BiDi SFP28 transceiver | 25G BiDi | 10km | SMF | 25GE LR; eCPRI & CPRI |
| 25G WDM SFP28 transceiver | 25G CWDM | 40km | SMF | 25G GE LR; eCPRI , CPRI; High-speed Servers; High-performance Computing Clusters |
| 25G DWDM | 10km | SMF | 25G Ethernet Data Center Networks; CPRI/eCPRI 5G Fronthaul Networks | |
| 25G LWDM | 40km | SMF | 25GBASE-ER Ethernet Data Center Networks; CPRI/eCPRI 5G Fronthaul Networks |
25G SFP28 Transceivers FAQs
Q：What are the advantages of 25G SFP28 modules?
A：25G modules offer a significant increase in bandwidth, making them a compelling choice for modern data centers and enterprise networks. Their advantages include a smooth upgrade path from 10G, cost efficiency compared to higher-speed alternatives, compatibility with existing fiber infrastructure, and support for industry standardization, ensuring interoperability. Additionally, 25G SFP28 modules play a crucial role in various applications such as cloud computing and 5G networks.
Q：How to handle interface alarm information?
A：First determine the alarm type, whether it is a “not supported”, “unknown”, “unqualified”, etc. or a transmitting and receiving optical power alarm. If the first situation occurs, it is because the module is incompatible with the device and needs to be replaced with another compatible module; if the latter situation occurs, you need to check whether the module is faulty or there is a problem with the matching jumper.
Q：What is the maximum supported distance for 25G SFP28 transceivers?
A：The maximum currently supported distance for 25G is 40km using SFP-25G-ER transceiver module. Additional optics may be released in the future to support longer distances.
Q：Are 25G SFP28 transceivers of different brands interoperable with each other?
A：It depends on the SFP28 standards with which the 25G transceivers are compliant. As long as the 25G SFP28 transceivers meet the associated industry standard specifications,they are fully interoperable.
Q：Can I use SFP28 transceivers in SFP+ ports?
A：Optical transceivers support the fixed speed as they are manufactured. The link could be down when using SFP28 transceiver for SFP+ link.
For some devices with 25G ports that are also 10G capable, Walsun recommends the 10/25GBASE-SR transceiver module with 25Gbps and 10Gbps dual rate, supporting connectivity options for 25G Ethernet, 10G Ethernet and data center. For more information, please refer to the 10/25GBASE-SR module.
Q：Can I use SFP+ transceivers in SFP28 ports?
A：Theoretically, the answer is yes. The link speed is limited to 10Gbps though.
Q：Can I connect SFP28 ports with QSFP28 ports?
A：Yes, it is available by configuring the QSFP28 100G transceiver to work at 4*25G breakout mode, and use the supported hardware to connect SFP28 ports with QSFP28 ports, such as QSFP28 to SFP28 DAC/AOC breakout cable or MTP-LC breakout cable with one 100G QSFP28 optical module is used on one side and four 25G SFP28 optical modules used on the other side as the following figure shows.
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