New asterisk websocket transport for pipecat (multimodal conversational AI)

Asterisk AI
1

Hi All,

I started a new asterisk transport + serializer for pipecat (Open source framework for voice and multimodal conversational AI.)

It’s not finished, but it works with chan_websocket

you can find it here: https://github.com/Mickaelh51/pipecat/commit/49e16786a22004e6a03e95fccf2ccc7b1a66c8ab

# Test
## Example script
Use pipcat/examples/foundational/49-asterisk-transport.py

:warning: To test we use own STT, but it's not yet intagrated to pipcat (but soon :smiley: )

# Docker compose with asterisk
```
networks:
  asterisk:
    driver: bridge
    ipam:
      config:
        - subnet: 172.38.0.0/16

services:
  asterisk_json:
      image: andrius/asterisk:git_debian-trixie
      container_name: asterisk-voicebot-json
      ports:
        - "5090:5060/udp"
      volumes:
        - ./extensions.conf:/etc/asterisk/extensions.conf
        - ./modules.conf:/etc/asterisk/modules.conf
        - ./pjsip.conf:/etc/asterisk/pjsip.conf
        - ./res_parking.conf:/etc/asterisk/res_parking.conf
        - ./ari.conf:/etc/asterisk/ari.conf
        - ./websocket_client.conf:/etc/asterisk/websocket_client.conf
        - ./extensions.ael:/etc/asterisk/extensions.ael
        - ./docker_data/asterisk_records/:/var/spool/asterisk/monitor/
      restart: always
      networks:
        asterisk:
          ipv4_address: 172.38.0.7

  asterisk_pain_text:
    image: andrius/asterisk:latest
    container_name: asterisk-voicebot-pain-text
    ports:
      - "5091:5060/udp"
    volumes:
      - ./extensions.conf:/etc/asterisk/extensions.conf
      - ./modules.conf:/etc/asterisk/modules.conf
      - ./pjsip.conf:/etc/asterisk/pjsip.conf
      - ./res_parking.conf:/etc/asterisk/res_parking.conf
      - ./ari.conf:/etc/asterisk/ari.conf
      - ./websocket_client.conf:/etc/asterisk/websocket_client.conf
      - ./extensions.ael:/etc/asterisk/extensions.ael
      - ./docker_data/asterisk_records/:/var/spool/asterisk/monitor/
    restart: always
    networks:
      asterisk:
        ipv4_address: 172.38.0.9
```

## Configuration files
### websocket_client.conf
```
[media_connection_pipecat_fastapi]
type = websocket_client
uri = ws://172.38.0.1:7860/media
protocols = media
username = medianame
password = mediapassword
connection_type = per_call_config
connection_timeout = 1000
reconnect_interval = 1000
reconnect_attempts = 5
tls_enabled = no
```

### extensions.conf
```
[globals]

[general]

[default]

; For mow_echo_test_server
exten = 127,1,NoOp(Echo test)
same  = n,Answer()
same  = n,Echo()


; Test without stasis and use pipcat
exten = 131,1,Answer()
same = n,Dial(WebSocket/media_connection_pipecat_fastapi/c(slin16)f(json))
```

## Calls
- To send json `MEDIA_START` call sip:131@localhost:5090
- To send plain text `MEDIA_START` call sip:131@localhost:5091