get_device
Description:
Gets the physical modem device reference (ie, USB, PCI, PCMCIA device), which may be dependent upon the operating system.
Warning: 
      
        
    
    The returned value is only valid until the property changes so it is only safe to use this function on the thread where this was constructed. Use dup_device if on another thread.
Parameters:
| this | A Modem. | 
Returns:
| The device, or  |