Yes, again, the CBWFQ bandwidth statement sets a minimum bandwidth guarantee, but it doesn't hold the class to that bandwidth. When dealing with provider terms, those terms sometimes vary per provider (and the technology they're using, although conceptually, it's often the same). Your provider's minimum might just be a guarantee of bandwidth you may use, without additional service charge, if you don't exceed it. The CBWFQ bandwidth statement, alone, would not "lock" your bandwidth to such a rate.
I don't recall encountering these particular terms. The generic terms would likely be CIR (committed information rate) for a max no extra charge rate, and PIR (peak information rate) for how much bandwidth you can actually obtain. The latter may have time/volume limitations and there may be multiple charge tiers. I.e. you might pay a surcharge only if your usage exceeds some "volume" over some time period.
If you need additional clarification on what these particular terms mean, you'll likely need to discuss their meanings with your provider.
Oh, and when dealing with bandwidths, you might also confirm what exactly your provider is "counting". I.e. L3, L2 or L1 bandwidth. That can be important because the provider might be counting L1 bandwidth, but CBWFQ policies, I don't believe, manage L1 bandwidth.
