This is the first backward-direction traffic parameter, representing the Committed Information Rate for Ethernet/Frame Relay or the Peak Cell Rate (PCR(0+1)) for ATM-CBR, exactly mirroring circuitFwdTDParam1 but governing traffic flowing out of the network toward this endpoint rather than into it. Because forward and backward parameters are configured independently, an admin can provision an asymmetric circuit, such as a higher downstream rate than upstream, by setting this to a different value than circuitFwdTDParam1. For example, setting circuitFwdTDParam1 to 1000000 and this backward parameter to 256000 would create an asymmetric circuit favoring the forward direction, similar in spirit to typical broadband access asymmetry.