126.96.36.199.7 IN_R1/B1 RTS PDU
A server implementation MUST NOT accept the IN_R1/B1 RTS PDU in any state other than Opened_B1W. If this condition is not met, the server MUST treat this PDU as a protocol error as specified in section 188.8.131.52.13.
If this RTS PDU is received in Opened_B1W state, an implementation of this protocol MUST perform the following actions in the sequence given:
Switch the default IN channel from the predecessor IN channel to the successor IN channel.
Set the value of ServerReceiveWindowSize in the IN R1/B2 RTS PDU to the value of ReceiveWindowSize from the server Virtual Connection.
Close the IN channel connection to the predecessor inbound proxy.
Transition to the opened state.