6100 ADCCP Programming Manual

Link States and Transitions
ADCCP/X21 Protocol Module
3–16 069225 Tandem Computers Incorporated
Figure 3-6. Link States and Transitions for Leased Lines
1
DTE Ready
DCE Ready
DTE
t = 1,
r = 1,
c = Off
i = Off
13 S
Send Data
t = Data,
r = 1,
c = On
i = Off
13 R
Receive Data
t = 1,
r = Data,
c = Off
i = On
DCE
DCE DTE
13
Data Transfer
t = Data,
r = Data,
c = On
i = On
Any State
DCE Not Ready
t = 1,
or
t = Data,
r = 0,
c = Off
c = On
i = Off
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