AI Call Center · 开源呼叫中心系统

基于 FreeSWITCH、Spring Boot 和 Vue 3 的开源呼叫中心系统，支持多租户、人工呼入呼出、智能外呼任务、ACD 技能组路由、IVR、WebRTC 坐席与录音管理，适用于企业客服和外呼业务，也可作为 AI 语音应用的呼叫底座。

An enterprise-grade AI call center system built on FreeSwitch and Spring Boot, providing multi-tenant, multi-skill-group, and intelligent routing — a complete set of call center capabilities.

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Official site: https://dongjb741280.github.io/ai-call-center/

Overview

This is an AI call center solution built on a microservices architecture, integrating FreeSwitch as the call engine and providing complete call management, agent management, intelligent routing, monitoring and statistics. It supports multi-company and multi-skill-group management, with enterprise-grade high-concurrency and high-availability characteristics.

This project is primarily intended for large-scale human inbound and outbound calling scenarios, or as the foundation for AI-powered unattended calling.

For a pure AI call center (unattended-first), please refer to:

https://github.com/dongjb741280/IntelliCall-Pro

Screenshots

Dashboard	Agent Management

IVR Management	Agent Monitor

Demo

Technical Architecture

flowchart LR
    AG[Agent Console<br/>Vue3 + JsSIP Softphone] -- WebSocket --> CALL
    CP[Caller / Customer] -- SIP/RTP --> FS[FreeSWITCH<br/>Media & Signaling]
    FS <-- "ESL events / commands" --> CALL[voxai-call<br/>Call Control :7200]
    FS -. Local recording files .-> MEDIA[FS_MEDIA<br/>Recording File Server :7430]
    CALL -- HTTP GET recordings --> MEDIA
    CALL -- HTTP --> IVR[voxai-ivr<br/>IVR Engine :7300]
    IVR -- callback --> CALL
    ADMIN[voxai-admin<br/>Admin API :7100] -- config --> CALL
    CALL --> R[(Redis)]
    CALL --> DB[(MySQL)]
    CALL -- Upload recordings --> M[(MinIO)]
    ADMIN --> DB
    ADMIN --> N[Nacos]
    CALL --> N

FS_MEDIA serves FreeSWITCH local recording files over HTTP on port 7430. After hangup, voxai-call downloads recordings from this server and uploads them to MinIO. See Recording Upload Flow.

Project Structure

ai-call-center/
├── voxai-common/          # Core business module (data layer)
├── voxai-admin/           # Admin API service (port 7100)
├── voxai-call/            # FreeSwitch integration service (port 7200)
├── voxai-ivr/             # IVR engine service (port 7300)
├── voxai-dialer/          # External outbound scheduler (HTTP client, disabled by default)
├── freeswitch/            # FreeSwitch configuration and Docker image
├── portal/                # Product portal (VoxHub)
├── docs/                  # Business docs (scope/flows/data model/engine interfaces)
├── .github/workflows/     # GitHub Actions (portal CI/CD)
├── .gitlab-ci.yml         # GitLab CI/CD pipeline
└── Dockerfile             # Multi-stage Docker build

Tech Stack

• Backend framework: Spring Boot 2.3.12
• Microservices: Spring Cloud + Nacos
• Database: MySQL/PostgreSQL/Oracle/SQL Server (multi-database support)
• Cache: Redis
• Message queue: RabbitMQ (optional Kafka)
• File storage: MinIO
• Call engine: FreeSwitch
• Build tool: Maven + Jib (build images without a Docker Daemon)
• Image registry: Harbor
• Containerization: Docker
• CI/CD: GitLab CI + Watchtower auto-deploy

Core Modules

voxai-common (Core Business Module)

• Entities: company, agent, skill group, call records and other business entities
• Data access: MyBatis mappers
• Utilities: encryption, ID generation and other common utilities

voxai-admin (Admin API Service)

• Administration: agent management, skill group management, company configuration
• Auth: Spring Security + JWT
• Scheduled tasks: Quartz scheduler
• Statistics: call statistics, agent state statistics
• File management: MinIO integration

voxai-call (FreeSwitch Integration Service)

• Call control: inbound/outbound, transfer, hold, mute, etc.
• Intelligent routing: ACD (Automatic Call Distribution) algorithms
• Agent state: real-time state management and monitoring
• WebSocket: real-time communication
• TCP service: agent state subscription
• Event handling: FreeSwitch event listening and processing

voxai-ivr (IVR Engine Service)

• Flow engine: parses cc_ivr_workflow.content into a node graph, executes by play/input/transfer
• Interaction: playback and digit collection via FreeSwitch playback / play_and_get_digits
• Handoff: calls back voxai-call on completion to route to skill group/agent/VDN/hangup

voxai-dialer (Outbound Task Engine)

Independent scheduler with cruise/predictive pacing, command acknowledgements, lease recovery and CDR result submission. See deployment and recovery before enabling.

Core Features

1. Call Management

• Inbound handling: automatic routing to a skill group
• Outbound: agent-initiated calls
• Call transfer: agent-to-agent transfer, skill-group transfer
• Call hold: hold / unhold
• Mute control: agent mute / unmute

This is the beginning of the README. Read the rest at the original. Read the full README ↗