Inside Macintosh: Telephony /

Chapter 3 - Directory Numbers / Directory Number Reference

Constants

Directory Number Types

The dnType parameter of the TELCountDNs function and the dnType parameter of the TELDNLookupByIndex function contain a value that specifies the types of directory numbers to consider. The Telephone Manager defines these constants for directory number types:

enum {
   telAllDNs               = 0,
   telInternalDNs          = 1,
   telInternalDNsOnly      = 2,
   telExternalDNs          = 3,
   telDNTypeUnknown        = 4
};

Constant descriptions

telAllDNs

All directory numbers.

telInternalDNs

Internal directory numbers (that is, directory numbers that are connected to a PBX or other non-public switch).

telInternalDNsOnly

Internal directory numbers that can place calls to other internal numbers only.

telExternalDNs

External directory numbers (that is, directory numbers that are connected to a public network).

telDNTypeUnknown

Unknown type of directory number.

IMPORTANT

Directory number type values 5 through 255 are reserved for use by the Telephone Manager. Values 256 through 32768 are reserved for use by telephone tools.