This setting selects the egress discard priority, normal (more readily discarded) or high (less readily discarded), applied at the Frame Relay interface for traffic matching a given IP type-of-service value; changes only affect new calls. Admins use it to determine which traffic gets dropped first during congestion, giving important traffic classes better survival odds under load. For example, an admin might set this to high for a TOS value carrying critical business traffic, so it is discarded less readily than default-priority traffic during congestion.