6100 ADCCP Programming Manual

Contents
vi 069225 Tandem Computers Incorporated
Polling 2-12
Standard Polling 2-12
Alternate Polling 2-14
ADCCP to Token Ring Communication 2-15
Station and Data Capacity on Links 2-16
Section 3 ADCCP/X21 Protocol Module
Features of ADCCP/X21 3-1
ADCCP/X21 Protocol Task Architecture 3-2
ADCCP Protocol Task 3-2
Call-Control Task 3-3
X.21 Driver 3-3
Line Configuration Options 3-3
ADCCP Line Configuration Options 3-3
X.21 Line Configuration Options 3-3
ACCEPT CHARGES 3-4
CIRCUIT-SWITCHED 3-4
CPS ACTION TABLE 3-4
NOT READY STATE 3-6
RETRY INTERVAL 3-6
RETRY MAXIMUM 3-6
DTE Time Limits 3-6
Link States and Transitions 3-7
Link States for Circuit-Switched Lines 3-8
Stopped State 3-10
Quiescent State 3-10
DTE and DCE States During Quiescence 3-10
Call Establishment State 3-12
ADCCP/X21 Signals a Call Request 3-12
DCE Signals Incoming Call 3-13
Netinfo Sequence 3-13
Connected State 3-13
Clearing State 3-14
Call Charges 3-14
Link States for Leased Lines 3-15