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There is no username in the SIP URI when calling a SIP registered endpoint

ERROR: 32223

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Calling Twilio SIP domains such as "" is not allowed. You can only call a registered SIP endpoint such as "".

Possible Causes

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  • Attempting to place a call from Twilio back to your own Twilio SIP domain. Twilio does not allow SIP calls between Twilio domains either in the same account or different accounts.
  • Attempting to call a registered SIP AOR without specifying the username you wanted to call

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