Restrictions of call retries are handled using the CallLength, CycleDelay, and CallInterval1 through CallInterval10 Config.ini configuration file variables. Local telecommunications authorities may have regulations regarding the frequency at which call attempts are made to a particular number. The CallLength, CycleDelay, and CallInterval1 through CallInterval10 parameters allow a redial cycle to be defined. CycleLength defines the number of steps in the cycle (with a maximum of 10), CallInterval1 through to CallInterval10 define the delay (in seconds) at each step transition, and CycleDelay defines the final delay (in seconds) before the cycle restarts.
The DialResetTime Config.ini configuration file variable enables you to configure the minimum amount of time in seconds between a hang-up and the next use of the modem. The default value is 10 seconds. During this time, TAPI sends initialization strings to reset the modem. If not granted an appropriate time interval, the modem will not reset properly.
These variables and other variables related to the Modem Manager are described in "VTS Programmer's Guide: Config.ini [SYSTEM] Section Settings for the Modem Manager".