서비스에서 발송을 대기 중인 최대 연결 수를 가져오거나 설정합니다.
This limits the number of simultaneous client connections awaiting dispatch. If this value is too low, client connection attempts may be rejected by the service. If it is too high, the service may appear slow or unresponsive to clients during heavy load periods. This property should be set to a value that allows the service to run at full capacity, and no higher.
When a higher layer in the stack calls AcceptDispatch, that connection is removed from the queue of connections awaiting dispatch.