That is accurate - SIP From Twilio is connect from Twilio to your SIP gear. We do not yet support SIP from your gear to Twilio.
After much consideration and talking with our customers, we decided to release our SIP features as it met our standard of quality rather than hold up release on bidirectional functionality.
After much consideration and talking with our customers, we decided to release our SIP features as it met our standard of quality rather than hold up release on bidirectional functionality.