This creatable/settable object configures the minimum acceptable maximum-downlink-bit-rate value for a profile's QoS negotiation. An admin sets this as the floor for download-ceiling negotiation, ensuring the network doesn't settle on a downlink cap too low for the profile's application to function. For example, a profile needing at least modest video-quality streaming might set this minimum threshold to rule out negotiated downlink rates too low to support it.