角色

回復 8# Qnewbie

How is the voice quality if the most of the end points are using ET263? How about the voice quality after 15 minuties?

YH

角色

Would you please tell me more about the following path?

GOIP (outside China) <=> Asterisk (where) <=> VSP (which and where) <=> China/Other

I believe that if the voip packets sent by the GOIP device is not blocked, then either encrypted or plain voip packets will have the same performance.

As for my cases, all SIP clients using ET263 is not encrypted. With the ET263 as the bridge between Mainland China and outside China, the voice quality would not dropped after 15-min conversation.

If the voice over VPN, the voice quality is pretty good. For better performance codec G729 has to be used.


YH

角色

Thank Qnewbie for providing more information.

I would like to ask you another question, have you experienced any degraded voice quality after a certain period of time without the use of ET263 as the bridge, let say 15 minutes chat if you make calls to China using VoIP only (no ISTP)?

YH