http://forums.logitech.com/t5/Logitech-Vid/DLink-DIR-615-and-SIP-and-VID/m-p/360050
与上一个firmware (3.01)相比, 3.10及以后的firmware在firewall项目下增加了4个选项. 如果采用default设置就会给SIP设备带来问题. 解决方法就是uncheck其中的sip box.
The D-Link 615 runs a so-called Application-layer Gateway (ALG) for SIP, which interferes with our SIP traffic and should be disabled:
- log into the admin page of your router
- select the 'Advanced' pane, and then 'Firewall Settings'
- scroll down, and *uncheck* SIP