IntroductionOverviewAfter被叫电话接听电话,没有听到音频。
被叫电话接听来电后,听不到任何声音。此时,被叫电话进入通话状态并开始计时通话时长,而主叫电话仍听到回铃音。
这适用于本公司提供的所有电话型号。
本文档适用于遇到此问题的所有客户。
被叫方摘机后,电话会向主叫方发送200 OK消息。该响应消息被发送到原始SIP请求的VIA字段中所携带的地址。在某些部署中,PBX位于私有网络并通过NAT映射到公网,但PBX发送的SIP消息在VIA字段中仍然包含私有IP地址。结果,电话的响应消息无法正确传递到对端设备。
启用电话设置中的“Strict proxy”功能(中文选项:“兼容特殊服务器”)。启用此功能后,电话将不再向VIA头中的地址发送响应消息,而是直接将其发送到SIP Contact字段中指定的地址。
如何启用电话的“特殊服务器兼容性”选项:
登录电话的WEB管理页面,然后点击“线路” - “高级设置” -- 勾选“配置特殊服务器兼容性” - 点击页面底部的提交,如下图所示。

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