AddOn Networks ADD-Q4CIQ4JU-P1M 400G QSFP-DD Passive DAC Cable

Link a Cisco 400G QSFP-DD interface directly to a Juniper 400G QSFP-DD interface across a 1 m copper run. The AddOn Networks ADD-Q4CIQ4JU-P1M is a passive, endpoint-coded direct-attach cable built for that mixed-vendor connection. It carries 400 Gb/s Ethernet traffic through integrated QSFP-DD plugs, eliminating the separate optical modules and patch cable required by an optical link. Use it inside a rack or between immediately adjacent equipment where a one-metre reach is sufficient: a router-to-switch link, a switch-to-server fabric attachment, or an interconnect between 400G aggregation devices. Passive copper suits short, fixed runs because both cable ends plug directly into the host ports. The Cisco-coded end and Juniper-coded end matter; this is not a same-vendor cable intended to have interchangeable endpoint identities. Select this cable when the installed interfaces specifically expect the named Cisco and Juniper QDD passive-DAC compatibility profiles. Its distinguishing configuration is the cross-vendor endpoint coding, rather than a generic QSFP-DD copper assembly. Check that the two target ports are QSFP-DD 400G interfaces and that their physical placement permits the 1 m cable route before installation. It provides a direct physical connection without intermediary transceiver modules.