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- Jan 3, 2011
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We've been having a problem with one-way audio at a remote office.
Here is a brief recap:
* Intermittent one-way audio for external extensions. Things will work fine for a few hours, then several calls will have one-way audio. The caller can hear the office, but the office can't hear the caller.
* Happens on multiple phones (both SPA 942).
* Happens both using the 3CX Tunnel and using static port forwarding.
* The PBX records audio both ways, even when the external extension can't hear the caller.
I think I just found something that is relevant but I'm not sure what to do with it.
A Wireshark capture shows all packets coming in to the phone system from the remote location ok, but packets going from the phone system to the remote location all have bad checksums in their headers.
I've attached a screenshot of the capture.
What does this mean and how is it fixed?
Thanks,
Here is a brief recap:
* Intermittent one-way audio for external extensions. Things will work fine for a few hours, then several calls will have one-way audio. The caller can hear the office, but the office can't hear the caller.
* Happens on multiple phones (both SPA 942).
* Happens both using the 3CX Tunnel and using static port forwarding.
* The PBX records audio both ways, even when the external extension can't hear the caller.
I think I just found something that is relevant but I'm not sure what to do with it.
A Wireshark capture shows all packets coming in to the phone system from the remote location ok, but packets going from the phone system to the remote location all have bad checksums in their headers.
I've attached a screenshot of the capture.
What does this mean and how is it fixed?
Thanks,