RADIUS Response messages received from a peer node are encapsulated into a Diameter Answer message.
If RCL receives a Diameter Answer message containing an embedded RADIUS Response message, RCL forwards the RADIUS Response on the RADIUS connection specified by DRL. The content of the Diameter Answer message header is based upon the content of the corresponding Diameter Request received from the DRL. This information is stored by RCL in the egress transaction record.
If RCL receives a Diameter Request message that doesn't contain an embedded RADIUS Request message, RCL discards the message.