Dear All,I have a customer which want to buy SPS208G Switch. They ask me if this switch support IPTV. I read datasheet but I didn't see. Please help me.

I help my customer to implement UC520 and in that process there are some problems:-UC520 is not stable, my customer make a call and the telphone goes on-hook but UC520 has held tone, the FXO led is green and not turn off. So my customer can not make ...

Hello community,I have added sip phone 3911 successfully to UC520, however the unityexpress doesn't know these phones ( they do not appear under "Configure" ->"Phones" ). So the call from pstn get to AA and then dial sip exttion, it says that "invali...