Canon FAX-L1000 - Manual (Page 525)

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FAX-L1000 Chapter 5: Appendix
c) D-Channel Standard Protocol
Figure 5-76 D-Channel Protocol Flow
UA
DISC
REL COMP
REL
DISC
CONN ACK
CONN
(ALERT) *
UA
SABME
(CALL PROC) *
SETUP
Calling party Called party ISDN
Bch Protocol
Dch
Protocol
Dch
Protocol
UA
DISC
REL COMP
REL
DISC
CONN ACK
CONN
(ALERT) *
UA
SABME
SETUP
Layer 3 Layer 2 Layer 2 Layer 3 Layer 2 Layer 2 Layer 3
Layer 2
connection
Protocol
*: Messages in brackets are options.
(SETUP ACK) *
Layer 3
connection
Protocol
Layer 3
disconnection
Protocol
Layer 2
disconnection
Protocol
Layer 2
connection
Protocol
Layer 3
connection
Protocol
Layer 3
disconnection
Protocol
Layer 2
disconnection
Protocol