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1. Rate: 40G; Connector: Duplex lC; with DDM 2. DFB+PIN; Low Power Consumption <3.5W 3. Applied in Campus Network and Data Center 4. Fully Compatible with 100+ Vendors 5. QSFP+ MSA CompliantSee more
The Juniper Networks QSFP-40G-ER4 compatible 40G QSFP+ transceiver module is equipped with LC duplex connectors, reaching a link up to 10km over OS2 single-mode fiber (SMF). This 40G optical transceiver comes with a bidirectional 4-channel QSFP+ connector, enabling a total of 40 Gbps bandwidth by each channel carrying a 10 Gbps data rate. DOM/DDM (digital diagnostics monitoring) function is supported on the 40G fiber optic transceiver to achieve real-time operating parameters monitoring.
QSFPTEK manufactured 40GBASE-ER4 QSFP+ module is compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-ER4 specifications. Besides, the quad small form-factor pluggable (QSFP) ER4 optic has been tested on host devices to ensure full compatibility with Juniper equipment, such as data center switches, enterprise routers, and server network interface cards (NICs). The third-party 40G SFP module is an ideal substitute to the Juniper Networks QSFP-40G-ER4 QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.
ER4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in long-haul networks, campus networks, metro networks, etc.
Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.


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Transceivers type QSFP-40G-ER4
We deployed this 40GBASE-ER4 QSFP+ module on a 40 km link, and it's been very reliable. Easy to install, stable performance, and good compatibility with our switches. A solid choice for long-reach 40G connections.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
Helpful
0
I found the right 40GBASE-ER4 QSFP+ optical transceiver easily on the website, and the ordering process was straightforward. Delivery was impressively fast, and the module has been working reliably. What stood out most was the friendly and highly responsive support team, who quickly helped replace a defective unit. Overall, a very positive experience and highly satisfied with both the product and service.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
Helpful
0
I purchased two 40G ER4 optical modules along with matching LC duplex patch cords, as the price for these cables was quite reasonable. I haven't used them yet, but the packaging appears sturdy, the products look undamaged, and they should function properly.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
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0
We are building a new data center that requires a large number of transceivers and cables. After carefully evaluating multiple factors, we found QSFPTEK to be the best choice. Given our high consumption, after-sales service is extremely important, and the warranty on these 40G QSFP+ transceivers provides great peace of mind. Once our project began, having a reliable supplier became essential—and QSFPTEK has consistently delivered excellent quality, responsive service, and fair pricing.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
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0
Excellent 40G ER4 module for long-distance connections. We achieved stable 40km data center links with no issues. Fast shipping and solid performance.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
Helpful
0
The price for the 40G QSFP+ ER4 module was the best I could find online. The ordering process was quick and hassle-free—I completed the purchase within minutes. Shipping was fast, and I received the modules sooner than expected.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
Helpful
0
I need to connect two switches at two buildings, the distance is about 29m. This ER4 QSFP+ matches my need. Thanks for the product and service.
Transceivers typeQSFP-40G-ER4
CompatibleJuniper
Helpful
0