106 is the Australian national textphone/TTY emergency number. It is operated by the Australian Communications Exchange, a non-profit organization that provides the relay services component for the National Relay Service. 106 can only be used by people with a TTY/textphone or a computer with terminal software (TTY imitation software) and a modem. 106 calls are given priority over other calls handled by the National Relay Service. 106 is a toll-free number.
Callers to 106 are asked to type PPP for police, FFF for fire or AAA for ambulance. The relay officer will then call the emergency service and relay the call. An able caller can also just say "police", "fire" or "ambulance" to the relay officer.