JNP-100G-4X25G-xM-BCC | Juniper Compatible 100GB QSFP to 4 x 25GB SFP25G Direct Attach Breakout Cable | 1M to 5M

Q: Will this work in place of the JNP-100G-4X25G-1M?
A: Yes. The JNP-100G-4X25G-xM-BCC is engineered to the same electrical and mechanical specifications as the Juniper JNP-100G-4X25G-1M. It conforms to IEEE 802.3bj (100GBASE-CR4), QSFP28 MSA, and SFP28 MSA standards, ensuring plug-and-play compatibility with Juniper platforms that accept the OEM part.

Q: Which Juniper platforms support this breakout cable?
A: This cable is compatible with Juniper switches and routers that feature 100G QSFP28 ports configured for 4x25G breakout mode. Specific platform support depends on the port's ability to support breakout configurations in the host operating system. Consult your Juniper platform documentation to confirm 4x25G breakout capability on the target port.

Q: Can I mix cable lengths in a single deployment, or use different lengths for each of the four SFP28 legs?
A: Each breakout cable is manufactured as a single assembly with fixed-length legs. The four SFP28 connectors at the breakout end are permanently attached to the twinax cable at equal lengths. To span different distances, select the appropriate cable length (1M, 3M, or 5M) that covers the furthest endpoint. All four legs will be the same length.

Q: Does this passive copper cable require FEC, and is each 25G lane truly independent?
A: Passive copper direct attach cables operating at 25Gb/s per lane typically do not require FEC for short distances (up to 5 metres), but FEC may be enabled by the host platform for additional margin. Each of the four SFP28 connectors operates as an independent 25G electrical lane with its own transmit and receive pairs, allowing you to connect each leg to a different device or leave legs unpopulated without affecting the others.

Q: What is the maximum safe bend radius for this twinax cable, and can I route it through tight cable management?
A: Passive twinax cables generally specify a minimum bend radius of approximately 25mm to 30mm to prevent signal degradation and jacket damage. Avoid tight loops or sharp bends, especially near the QSFP28 or SFP28 connector bodies. Route the cable with smooth curves through cable management arms or trays to maintain signal integrity across all four lanes.