@startuml
skinparam defaultTextAlignment center

rectangle "GPSS Block Connector" as block #LightSeaGreen

interface " " as q1
interface " " as q2
interface " " as q3
interface " " as q4
interface " " as q5
interface " " as q6

block -u-> q3: blocked
q1 -d-> block: input
block -u-> q5: trns

q2 -u-> block: block
block -d-> q4: output
q6 -u-> block: event

q5 -[hidden]- q6
q1 -[hidden]r- q3
@enduml
