1.6 Media Channel Device Naming

To determine available resources, call ipm_Open( ) on a board device, then call ATDV_SUBDEVS to get the available resources. (SRL operations are described in the Standard Runtime Library API Library Reference.)

To determine available resources in the Windows environment, use the sr_getboardcnt( ) function, which returns the number of boards of a particular type. (SRL operations are described in the Standard Runtime Library API Library Reference.)

Each IP media channel device follows the naming convention ipmBxCy; where:

• B is followed by the unique logical board number
• C is followed by the number of the media device channel

You may also use the ipm_Open( ) function to open a board device, ipmBx, where B is followed by the unique logical board number.

Before you can use any of the other IP media library functions on a device, that device must be opened. When the device is opened using ipm_Open( ), the function returns a unique device handle. The handle is the only way the device can be identified once it has been opened. The ipm_Close( ) function closes a device.

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