0.5m 40G QSFP+ DAC Cable. he EXQSFP4050CM is a Juniper EX-QSFP-40GE-DAC50CM compatible direct-attach copper QSFP+ cable that's designed, programmed and tested to work with Juniper brand compatible switches and routers and complies with MSA industry standards. Designed for high-speed performance, this low-power, low-latency QSFP+ cable is a cost-effective alternative to fiber-optic cable assemblies, supporting short-distance applications such as point-to-point in-rack network switch or server connections.