P sequencing rules ( 20, 23) timer events ( 20, 25) timers ( 19, 23) 32 Server printer 8 29 8 29 7 27 26 29 10 9 20 8 23 9 Processing message 21 T 23 21 21 Timer events 21 client ( 20, 23) 25 server ( 20, 25) 24 Timers 21 client ( 19, 20) 25 server ( 19, 23) 21 34 21 9 21 Triggered events - higher-layer 33 client ( 19, 20) Protocol Details server ( 19, 23) 19 U R 27 7 7 V 7 7 8 8 8 28 X S 19 Security 32 32 Sending message 24 24 20 24 24 22 21 24 22 24 24 24 Sequencing rules client ( 20, 20) server ( 20, 23) Server abstract data model ( 19, 23) triggered events ( 19, 23) initialization ( 19, 23) local events ( 20, 25) message processing ( 20, 23) 25 23
P 32 8 8 7 26 10 20 23 Processing message 21 23 21 21 21 25 24 21 25 21 21 21 33 Protocol Details 19 R 7 7 7 7 8 28 S Security 32 32 Sending message 24 24 20 24 24 22 21 24 22 24 24 24 Sequencing rules client ( 20, 20) server ( 20, 23) Server abstract data model ( 19, 23) triggered events ( 19, 23) initialization ( 19, 23) local events ( 20, 25) message processing ( 20, 23) 25 23 sequencing rules ( 20, 23) timer events ( 20, 25) timers ( 19, 23) Server printer 29 29 27 29 9 8 9 T Timer events client ( 20, 23) server ( 20, 25) Timers client ( 19, 20) server ( 19, 23) 34 9 Triggered events - higher-layer client ( 19, 20) server ( 19, 23) U 27 V 8 8 X 19