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Build a Twilio Hard Phone with SIP from Twilio, Raspberry Pi, Asterisk, FreePBX, and the Obihai OBi100
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Beautiful Vintage Telephone With Raspberry Pi As VOIP Handset Build #piday # raspberrypi @Raspberry_Pi « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Build an IP codec for sip.audio with a Raspberry Pi and a USB microphone | With the free inqodec firmware from In:Quality, quickly and easily build your own SIP and Opus enabled
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