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Comment by superuser2

13 years ago

Voicemail, 7-digit dial (most SIP providers only take 10), forwarding, filtering, etc.

Twilio could theoretically handle these things for you, but they're typically handled in a PBX.

Hm, maybe I should have been more specific. Given that this is an interesting hack to get a PSTN call to an analogue set through Twilio, why did they bother with the SIP proxy?

  • I'm not sure I understand your question, but I think it's because the ATA (like most modern/cheap ATAs) only speaks SIP.