JNP-SFP-25G-DAC-xM-BCC | Juniper Compatible SFP28 To SFP28 Copper Direct-Attach 25GBASE-CR1 Cable | 1 to 5M

Q: Will this work in place of the Juniper JNP-SFP-25G-DAC-1M?
A: Yes. This cable is designed as a plug-and-play replacement for the JNP-SFP-25G-DAC-1M. It complies with IEEE 802.3by 25GBASE-CR1 and SFP28 MSA standards, matching the electrical and mechanical specifications of the Juniper original. It operates at 25 Gb/s over passive twinax copper and is interchangeable with the OEM part in Juniper network equipment.

Q: Which Juniper platforms are compatible with this DAC cable?
A: This cable is compatible with any Juniper platform featuring SFP28 ports that support 25 Gigabit Ethernet over copper direct attach. This includes enterprise routers, data centre switches, and server network interface environments where SFP28 mechanical and electrical standards are implemented. Verify your specific platform supports 25GBASE-CR1 passive DAC operation.

Q: Do different cable lengths have different FEC requirements?
A: Yes. Per IEEE 802.3by, 1m cables typically operate in CA-25G-N class without FEC. The 3m length may benefit from BASE-R FEC for additional link margin, while 5m cables generally require RS-FEC on both host ports to meet the CA-25G-L class and achieve full reach. Consult your switch documentation to confirm FEC mode support and configuration.

Q: Can I mix this cable with optical transceivers or AOC in the same 25G fabric?
A: Yes. 25GBASE-CR1 passive DAC, 25GBASE-SR optical transceivers, and 25G AOC cables all terminate at the same SFP28 electrical interface and operate at 25 Gb/s per lane. You can freely mix media types within a single fabric, though consistent FEC settings across link pairs are typically required. DAC is preferred for short intra-rack connections where cost and power efficiency matter most.

Q: What is the power consumption compared to active optical cable at this speed?
A: Passive copper DAC consumes negligible power as it contains no active electronics. AOC cables embed active optical transmitters and receivers, typically drawing 1 to 1.5 watts per end. Over hundreds of links in a data centre fabric, passive DAC significantly reduces cooling load and power infrastructure requirements. For reaches under 5m, passive DAC is the most power-efficient 25 Gb/s interconnect option.