[Asterisk-Users] About Audio Latency from PSTN to SIP

Qiao Yuansong qys at iscas.ac.cn
Wed Apr 6 22:36:34 MST 2005


Hi all,

I built a VoIP PBX box with asterisk and one x100p card. Every thing is ok except there is a short audio latency from PSTN to SIP and no delay in the reverse direction. 

At the beginning of a call, the latency is not very long, but it becomes more and more obvious along with time. If the call keep 10 minutes, the delay will be about half or one second.

Anyone knows the reason, and any suggestion?

Thanks a lot.

--- 
Best regards,
 Qiao Yuansong
 mailto: qys at iscas.ac.cn
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