Constant

Meaning

LINEBUSYMODE_STATION

The busy signal indicates that the called party's station is busy. This is usually signaled with a normal busy tone.

LINEBUSYMODE_TRUNK

The busy signal indicates that a trunk or circuit is busy. This is usually signaled with a fast busy tone.

LINEBUSYMODE_UNKNOWN

The busy signal's specific mode is currently unknown but may become known later.

LINEBUSYMODE_UNAVAIL

The busy signal's specific mode is unavailable and will not become known.