ISDN Constants
// Flags for ISDNDEVCAPS
#define ISDN_DEFAULT 0x00000000L
// Subtype ordinals for ISDNDEVCAPS
#define ISDN_SUBTYPE_INTERNAL 0x00000000L
#define ISDN_SUBTYPE_PCMCIA 0x00000001L
// Flags for ISDNLINECAPS
#define ISDN_LINE_DEFAULT 0x00000000L
#define ISDN_LINE_INACTIVE 0x00000001L
// Channel flags for ISDNLINECAPS
#define ISDN_CHAN_DEFAULT 0x00000000L
#define ISDN_CHAN_INACTIVE 0x00000001L
#define ISDN_CHAN_SPEED_ADJUST 0x00000002L
// Switch type for ISDNLINECAPS
#define ISDN_SWITCH_NONE 0x00000000L
#define ISDN_SWITCH_AUTO 0x00000001L
#define ISDN_SWITCH_ATT 0x00000002L
#define ISDN_SWITCH_NI1 0x00000004L
#define ISDN_SWITCH_NTI 0x00000008L
#define ISDN_SWITCH_INS64 0x00000010L
#define ISDN_SWITCH_1TR6 0x00000020L
#define ISDN_SWITCH_VN3 0x00000040L
#define ISDN_SWITCH_NET3 0x00000080L // retained for
// backward compatibility
#define ISDN_SWITCH_DSS1 0x00000080L
#define ISDN_SWITCH_AUS 0x00000100L
#define ISDN_SWITCH_BEL 0x00000200L
// Speed type for ISDNLINECAPS
#define ISDN_SPEED_NONE 0x00000000L
#define ISDN_SPEED_56K_VOICE 0x00000001L
#define ISDN_SPEED_56K_DATA 0x00000002L
#define ISDN_SPEED_64K_DATA 0x00000004L
#define ISDN_SPEED_128K_DATA 0x00000008L
// Options for ISDNLINECAPS
#define ISDN_LINEOPT_DEFAULT 0x00000000L
#define ISDN_LINEOPT_CHANNELID 0x00000001L
#define ISDN_LINEOPT_FIXEDCOUNT 0x00000002L
// Options for channel
#define ISDN_CHANOPT_DEFAULT 0x00000000L
#define ISDN_CHANOPT_SHOW_STATUS 0x00000001L
#define ISDN_CHANOPT_ENABLE_LOG 0x00000002L
#define ISDN_CHANOPT_INACTIVE_TIMEOUT 0x00000004L