The biggest challenge with doing a "Press 1" scenario is that we'd basically have to handle the audio for all those calls so it was stateful and we could detect the 1.
With our system we don't handle audio 90% of the time and just hand off calls.
Handling audio would be a big increase in load and the quality would be different (could be better or worse) on incoming calls when compared to normal non-simring calls.
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