This attribute defines the admission options for Yellow Colored Frames. A service may be defined to admit more yellow frames into the network when the volume of the green frames does not consume all available CIR bandwidth. In this case, the additional yellow frames are allowed to consume the unused green frame bandwidth. This attribute implements the MEF's Coupling Flag (CF) attribute. This capability is configured through traffic conditioning options. The two options applied to the Token Bucket Rate Adaptation Algorithm (TBRA) are: true The states of TBRA(CBS, CIR) and TBRA(EBS, EIR) are correlated. That is, the service is defined to admit more yellow frames into the network when the volume of the green frames does not consume all available CIR bandwidth. With this option when the content of the first token bucket TBRA(CBS, CIR) reach its maximum value, CBS, the overflow of tokens is allowed to the second bucket, TBRA(EBS, EIR), up to a maximum value of EBS. false The states of TBRA(CBS, CIR) and TBRA(EBS, EIR) are not correlated. That is, the service is defined NOT to admit more yellow frames into the network when the volume of the green frames does not consume all available CIR bandwidth. With this option the contents of one token bucket are updated independently from the contents of the other token bucket. .