I've been having a strange issue with my PBX for years and I mostly ignored it but it's getting more annoying lately.
When my wife calls my cell from home, most of the time the first call rigs briefly (not even a full ring, just a split second) then goes to the cell phone VM. This has been happening across 5-6 handsets that I've gone though over the years, so I don't think it's the cell phone itself. Also it has been happening through 2 cell phone providers (Rogers and Telus, currently I am on Telus), so I don't think it's that either.
It's also happening sometimes when calling from the work PBX (which is also VoIP) and it's happening to some of my colleagues who have work phones on Rogers.
On my PBX I'm using mostly Anveo Direct for outbound and I've tried changing routes/carriers with zero luck.
For the work PBX we're using a single carrier but they have a ton of upstream providers.
Bottom line is I don't think there's a single common carrier across all of these situations.
I don't have a definitive date of when this started to happen. My theory is that it may have started happening around the time the carriers started implementing HD Voice calling so it may be some sort of codec negotiation issue where the calls starts, then they fail to negotiate the codec and the calls is then sent to voicemail. It's only a theory and I have zero proof for it.
Anyone else experiencing something like this ?
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