5.4 Initialization

This section describes the demo initialization as shown in Figure 4.

Figure 4. IP Media (IPML) System Initialization

The Resource Manager calls the init( ) function, which does the following:

1. Reads the command line options
2. Reads and parse the configuration file and prints the configuration
3. Gets the resources available in the system:
   1. Gets the number of IP channels in the system
   2. Gets the number of PSTN channels in the system
   3. Finds the minimum between the system channels and the user request
4. Initializes the IP Protocol Manager
5. Looks for a free Ipmedia device and returns a pointer to it
6. Opens the Ipmedia device and if the open succeeds returns a pointer to it
7. Looks for a free PSTN device and returns a pointer to it
8. Opens the PSTN device and if the open success returns a pointer to it
9. Looks for a free IP Protocol (IPP) device and returns a pointer to it
10. Opens the IPP device and if the open success returns a pointer to it
11. Initializes the devices on the channel

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