FCC 不是 ESL 的替代品，它让不熟悉 FreeSWITCH 的人先跑通呼叫业务，再决定是否继续投入。
Use firewalls, ACLs, extension permissions, dialplan rules, and carrier limits to contain FreeSWITCH toll fraud.
用防火墙、ACL、分机权限、拨号规则和运营商限额，封住 FreeSWITCH 最常见的盗打路径。
公开招募语音网关和中继线路供应商，免费测试，结果合格后再推荐给呼叫中心课程读者。
A fixed offline FreeSWITCH image keeps the course focused on calls and AI audio instead of build failures.
后续智能呼叫平台课程统一使用离线 FreeSWITCH 镜像，减少下载、依赖和编译环境差异带来的干扰。
AI can make work faster without making every answer reliable. Here is how to work with it without giving up judgment.
AI能把工作做得更快，却不能替你判断答案是否可靠。普通人该怎样真正开始与AI协作？
FCC does not replace ESL. It helps newcomers validate a call workflow before committing to deeper FreeSWITCH work.
