// Radios use a large variety of predefined frequencies.

#define MIN_FREE_FREQ 1201 // -------------------------------------------------
// Frequencies are always odd numbers and range from 1201 to 1599.

#define FREQ_SYNDICATE 1213  // Nuke op comms frequency, dark brown
#define FREQ_CTF_RED 1215  // CTF red team comms frequency, red
#define FREQ_CTF_BLUE 1217  // CTF blue team comms frequency, blue
#define FREQ_CENTCOM 1337  // CentCom comms frequency, gray
#define FREQ_SUPPLY 1347  // Supply comms frequency, light brown
#define FREQ_SERVICE 1349  // Service comms frequency, green
#define FREQ_SCIENCE 1351  // Science comms frequency, plum
#define FREQ_COMMAND 1353  // Command comms frequency, gold
#define FREQ_MEDICAL 1355  // Medical comms frequency, soft blue
#define FREQ_ENGINEERING 1357  // Engineering comms frequency, orange
#define FREQ_SECURITY 1359  // Security comms frequency, red

#define FREQ_STATUS_DISPLAYS 1435
#define FREQ_ATMOS_ALARMS 1437  // air alarms <-> alert computers
#define FREQ_ATMOS_CONTROL 1439  // air alarms <-> vents and scrubbers

#define MIN_FREQ 1441 // ------------------------------------------------------
// Only the 1441 to 1489 range is freely available for general conversation.
// This represents 1/8th of the available spectrum.

#define FREQ_ATMOS_STORAGE 1441
#define FREQ_NAV_BEACON 1445
#define FREQ_AI_PRIVATE 1447  // AI private comms frequency, magenta
#define FREQ_PRESSURE_PLATE 1447
#define FREQ_AIRLOCK_CONTROL 1449
#define FREQ_ELECTROPACK 1449
#define FREQ_MAGNETS 1449
#define FREQ_LOCATOR_IMPLANT 1451
#define FREQ_SIGNALER 1457  // the default for new signalers
#define FREQ_COMMON 1459  // Common comms frequency, dark green

#define MAX_FREQ 1489 // ------------------------------------------------------

#define MAX_FREE_FREQ 1599 // -------------------------------------------------

// Transmission types.
#define TRANSMISSION_WIRE 0  // some sort of wired connection, not used
#define TRANSMISSION_RADIO 1  // electromagnetic radiation (default)
#define TRANSMISSION_SUBSPACE 2  // subspace transmission (headsets only)
#define TRANSMISSION_SUPERSPACE 3  // reaches independent (CentCom) radios only

// Filter types, used as an optimization to avoid unnecessary proc calls.
#define RADIO_TO_AIRALARM "to_airalarm"
#define RADIO_FROM_AIRALARM "from_airalarm"
#define RADIO_SIGNALER "signaler"
#define RADIO_ATMOSIA "atmosia"
#define RADIO_AIRLOCK "airlock"
#define RADIO_MAGNETS "magnets"

#define DEFAULT_SIGNALER_CODE 30