Inside Macintosh: Telephony /

Chapter 2 - Telephone Terminals / Telephone Terminals Reference

Constants

Alerting Patterns

The alertPattern parameter to the TELAlert function indicates the alerting pattern of a call. The Telephone Manager defines these constants for alerting patterns.

enum {
   telPattern0             = 0,
   telPattern1             = 1,
   telPattern2             = 2,
   telPattern3             = 3,
   telPattern4             = 4,
   telPattern5             = 5,
   telPattern6             = 6,
   telPattern7             = 7,
   telPatternOff           = 8,
   telPatternUndefined     = 15
};

Alerting patterns are defined by telephone network switches and telephone tools. Some use ring patterns to distinguish between different types of calls, such as calls originating outside the switch, calls originating inside, and high priority calls. You need to consult the information provided by the telephone tool and the switch to determine the ring patterns used and their significance.

Note

Alerting patterns values in the range 8 through 14 and 16 through 255 are reserved for use by the Telephone Manager. Alerting patterns values in the range 256 through 32768 are available for use by telephone tools.