LINEBUSYMODE_ Constants

The LINEBUSYMODE_ bit-flag constants describe different busy signals that the switch or network may generate. These busy signals typically indicate that a different resource that is required to make a call is currently in use.

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.

The high-order 16 bits can be assigned for device-specific extensions. The low-order 16 bits are reserved.

Note that busy signals may be sent as inband tones or out-of-band messages. TAPI makes no assumption about the specific signaling mechanism.