comm/datamodem/portname
The
comm/datamodem/portname device class consists of the device names to which
modems are attached. When this device name is specified in a call to the lineGetID function, the function
fills the VARSTRING
structure with a null-terminated ANSI (not UNICODE) string specifying the name
of the port to which the specified modem is attached, such as
"COM1\0". This is intended primarily for identification purposes in
the user interface, but could be used under some circumstances to open the
device directly, bypassing the service provider (if the service provider does
not already have the device open itself). If there is no port associated with
the device, a null string ("\0") is returned in the VARSTRING
structure (with a string length of 1).