An open source telephony gateway for Google's dialogflow using Simwood IP trunks.
The following environment variables are used to provide run-time configuration to the application (optionally, a configuration file can be used instead of environment variables; see config/local.json.example for details).
| Environment Variable Name | Description | Required? |
|---|---|---|
| GOOGLE_APPLICATION_CREDENTIALS | path to a json key file containing GCP credentials used to authenticate to dialogflow | Yes |
| DIALOGFLOW_PROJECT | the dialogflow project id to connect calls to | Yes |
| DIALOGFLOW_LANG | language to use for the dialogflow session | No (default: en-us) |
| DIALOGFLOW_WELCOME_EVENT | name of initial event to send to dialogflow when connecting call | No |
| DIALOGFLOW_NO_INPUT_TIMEOUT | number of seconds of no detected intent to allow to pass before reprompting the caller | No |
| DIALOGFLOW_ENABLE_DTMF_ALWAYS | if 1, dtmf will always be collected and sent to dialogflow as a text input | No(default: 1) |
| DIALOGFLOW_INTERDIGIT_TIMEOUT | number of milliseconds to wait after collecting a dtmf before sending the collected dtmf digits to dialogflow as a text query | No (default: 3000) |
| DIALOGFLOW_BARGE_PHRASE | a phrase that when uttered by the caller will cause audio playback to the caller to cease | No |
| DIALOGFLOW_THINKING_SOUND | path to an audio file (wav or mp3) to play while dialogflow intent detection and back-end fulfillment are proceeding | No |
| HTTP_PORT | http port of websocket server to listen on for incoming client connections | No |
| SIP_TRUNK_GATEWAY | IP address or DNS to send outbound INVITEs to for call transfer | No, but call transfer will be disabled if not specified |
| SIP_OUTDIAL_CLI | CLI to use on outdials | Yes, if call transfer is enabled |