In these unprecedented times of social distancing and a virus pandemic we are seeing a huge increase in the number of voice calls being made. Our Supernetwork team is working around the clock to ensure that calls make it through.
https://www.twilio.com/blog/working-around-pstn-congestion-with-twilio-client
origin - https://www.pipiscrew.com/2020/03/working-around-pstn-congestion-with-twilio-client/ working-around-pstn-congestion-with-twilio-client