LINESPECIALINFO_ Constants

The LINESPECIALINFO_ bit-flag constants describe special information signals that the network can use to report various reporting and network observation operations. These constants are special coded tone sequences transmitted at the beginning of network advisory recorded announcements.

LINESPECIALINFO_NOCIRCUIT

Special information tone that precedes a no-circuit or emergency announcement (trunk blockage category).

LINESPECIALINFO_CUSTIRREG

Special information tone that precedes a vacant number, AIS, Centrex number change and nonworking station, access code not dialed or dialed in error, and manual intercept operator message (customer irregularity category). LINESPECIALINFO_CUSTIRREG is also reported when billing information is rejected and when the dialed address is blocked at the switch.

LINESPECIALINFO_REORDER

Special information tone that precedes a reorder announcement (equipment irregularity category). LINESPECIALINFO_REORDER is also reported when the telephone is kept offhook too long.

LINESPECIALINFO_UNKNOWN

Specifics about the special information tone are currently unknown but can become known later.

LINESPECIALINFO_UNAVAIL

Specifics about the special information tone are unavailable, and cannot become known.

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

Special information tones are defined for advisory messages and are not usually used for billing or supervisory purposes.

See Also

LINECALLSTATUS