我现在要在内网环境中使用sip.js实现网页电话，现在卡在了购买ippbx环节，我发现有很多厂商的ippbx并不支持基于websocket的sip协议，各位有没有遇到类似的情况，或者官方有没有类似的ippbx产品推荐？
I am currently trying to implement a web phone using sip.js in an intranet environment, but I am stuck on purchasing an IP PBX. I have found that many vendors' IP PBX systems do not support the WebSocket-based SIP protocol. Has anyone encountered a similar situation, or does anyone have official IP PBX product recommendations?
我现在要在内网环境中使用sip.js实现网页电话，现在卡在了购买ippbx环节，我发现有很多厂商的ippbx并不支持基于websocket的sip协议，各位有没有遇到类似的情况，或者官方有没有类似的ippbx产品推荐？
I am currently trying to implement a web phone using sip.js in an intranet environment, but I am stuck on purchasing an IP PBX. I have found that many vendors' IP PBX systems do not support the WebSocket-based SIP protocol. Has anyone encountered a similar situation, or does anyone have official IP PBX product recommendations?