Much, much easier to use Power Automate for this,

@siringo I have worked in this space since 1998, which makes me old! Lol. The major difference isn't the SDWAN vs MPLS. It's the loss/jitter tolerance of modern voice codecs, i.e. the software that takes your voice, samples it, and encodes it into packets on a wire.

When VoIP was startign out, right around the time I joined the workforce, QoS over SLA-backed PtP cirvuits, later MPLS. were absolutely necessary, as was an solid QoS networking config/deployment.

That's when "G.711" and "G.729" were pre-eminent. G.729 was used to compress voice across WAN links, and it was not at all loss or jitter tolerant. Barely any loss/excessive jitter, and forget it.

Modern codecs- Opus especially (Opus has been added to the public domain) - are incomparably better than predecessors. Full detail here: https://opus-codec.org/. It is adaptive, meaning, it will adapt to network conditions, expanding up to wideband if the bandwidth is available, but having the ability to adapt to network conditions in ways G.729 couldn't come close to.

In there early days of improved codecs - SILK, iLBC, I was a holdout, like most early VoIP engineers who suffered through the early pain points. However, the proof is in the reality that some of the largest organizations in the world, and all major prem, and cloud IP-PBX/UCaaS providers support Opus. Think about COVID - are any of us connecting across MPLS anymore? Nope. Voice quality issues? Here and there, and just as often having to do with acoustic echo caused by poor mic/speakers as it is network packet loss, etc. Mostly, we all do just fine. This wouldn't have been posible without these codec advancements.

I spent years building Nortel, the Cisco, then Cisco/Microsoft UC practices. These days, I strongly advise you no longer think of VoIP as something you buy. Think of it as a feature of you broader commmunication collaboraation solution. Maybe that's Cisco Webex Voice/Teams. Maybe that's Microsoft Teams. Maybe that's Google Voice and Slack.

My point is - buying a dedicated Voice, or even Voice/Video, or even Voice/Video/Meetings solution is an anachronism. Personally, I view Microsoft Teams, either with Microsoft-provided PSTN access for smaller businesses, or self-provided SIP Trunking, i.e. "Direct Routing," as the best platform. Not all the corner case voice features are there yet - Cisco's platform does that better - but Microsoft's platform addresses much more critical path items that Cisco never will, whereas Microsoft will close voice gap/mostly has.

My 2 cents!