When an incoming call is received by one of the pool modems, the Modem Manager passes the initial data to objects that have previously registered an interest in incoming calls (discriminator modules).
• If an object accepts the offered call, then the Modem Manager sets up transparent data paths between the modem and the recipient.
• If no one accepts the call, then the Modem Manager returns the call to the operating system to allow other applications the opportunity to take the call.
This incoming discrimination can also function with incoming audio calls.
At any time there are three logical PCs involved in a call:
• The caller or receiver;
• The Modem Manager server; and
• The owner of the physical modem.
Depending upon the configuration of your system, the roles of these three logical PCs may be played out on one, two, or three physical PCs.
Many enhancements have been made to the Modem Manager in VTS 6.50. The section that follows identifies these improvements.