On 2016-11-22 07:49 PM, Pete Mundy wrote:
One direction that may be worth exploring further is his ATA's config (or perhaps swapping it for a different model). Eg adjusting echo cancellation or line impedance settings.
I have to be careful here as I auto-provison these devices and changes would propogate to every user. Echo cancellation is off. Do you think it should be on?
Is the ATA he is using the same as the ATA you use?
No but it is the same as other users who do not have the problem. I use a SIP phone and a Cisco ATA.
Failure to correctly recognise and decode DTMF is just one of many reasons why I never use them (ATAs). Like faxing over VoIP, they're just too much trouble :(
I understand but some use cases just need it.
Genuine IP phones are pretty good value these days. Could you drop one of those on-site as a temporary measure to prove that it's phone and/or ATA related?
He does want to have an extension so that won't work.
Ps, you might also want to consider joining VoiceOps (if you're not already subscribed) and posting there. https://puck.nether.net/mailman/listinfo/voiceops
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