HP 8920B - Page 473

473
Chapter 8, Programming The Call Processing Subsystem
Using the Call Processing Subsystem’s Remote User Interface
NOTE: The Access state may occur more than once during state transitions. For example:
Connect - Access - Access - Connect. The number of times the Access state occurs is
situation and system dependent.
If, for some specific application need, it is necessary to query the data messages
before all state transitions have occurred, the control program may have to wait
some finite amount of time before requesting the data or request the data multiple
time (checking for the presence of data each time) or some combination of the
two.
Call Processing Subsystem state changes can be monitored by the control program
through the Call Processing Status Register Group.
See "Call Processing Status
Register Group" on page 470
for further information.
Table 44 Call Processing Subsystem State Transitions
Starting State Command State Transitions Final State
Idle Active Idle - Active Active
Active Register Active - Register - Active Active
Active Page Active -Page - Access - Connect Connect
Connect Handoff Connect - Access - Connect Connect
Connect Release Connect - Active Active
Connect Order Connect - Access - Connect Connect
Any state Active Current state - Active Active