[asterisk-users] One Way Delay in Audio Over Analog

[MatsK]

Brian Alexander wrote:
> I have been trying to track down the cause/fix for a problem and I am
> out of ideas... I am hoping one of you can point me in the right direction.
> 
> The symptom is that when a calls is placed from an internal extension
> through an analog line to a number on the pstn the caller can hear the
> callee but the callee can not hear the caller for as long as ten seconds.
> 
> The problem appears to happen fairly consistently on the same pstn
> numbers. However, I have not seen a common characteristic in those
> numbers. For example, one of them is a direct number to a cell phone and
> another is to a Verizon fiber-optic phone/data service.
> 
> The problem does not seem to be related to the type of SIP phone being
> used by the caller - for example, we have tried both X-Lite and Polycom
> phones without a change in behavior.
> 
> The problem does not appear to occur if the callee then calls into our
> system (at least the one time I was able to have this happen).
> 
> Turning on or off echo cancellation and/or call progress does not seem
> to change the behavior.
> 
> I will appreciate any ideas you have. I am certainly stumped.
> 
> Thanks and Happy New Year!
> -Brian

Brian,

What about some facts ?

Hardware ?

Software versions ?


/Mats