Description: NONE - Subscription to facilities not enforced. FCN-ON - Flow Control Negotiation enabled. Packet and Window size negotiation facilities in an inbound call will be allowed. Packet and Window size facilities will always be included in outbound calls and call accepted/ connected when this parameter is set. FCN-OFF - Flow Control Negotiation disabled. Inbound calls containing Packet and Window size facilities will be cleared. Packet and Window size facilities will not be present in outbound calls and call accepted/ connected when this parameter is set. TCN-ON - Throughput Class Negotiation enabled. The throughput class negotiation facility in an inbound call will be allowed. The throughput class negotiation facility will always be included in outbound calls and call accepted/connected when this parameter is set. The facility is passed onward to the destination in the call packet transparently and does not alter the handling of the SVC data within the node. TCN-OFF - Throughput Class Negotiation disabled. Inbound calls containing the throughput class negotiation facility will be cleared. The throughput class negotiation facility will not be present in outbound calls and call accepted/connected when this parameter is set. Some combinations of above options are allowed (e.g. FCN-ON+TCN-ON).