Voice over Internet: still terrible.
Conversation
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Wi-Fi is unlikely to be the reason I had crystal-clear received audio but couldn't send any 😏
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Hangouts voice in this case. I've been all over the map with other tools whose machinery I don't know.
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Im using hardware SIP phones and SIP adapters (SPA3102, FritzBox) since a couple of years now and I'm quite happy with how it works.
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Also I took some time to learn Asterisk. It is a pain to set up and test but once the part after the pain is worth it.

