How does a BT110 device handle ‘SIP 403’ messages from the proxy/server during registration?

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Upon receiving a ‘SIP 403’ response from the proxy server after making a SIP registration attempt, the BT110 device will stop further registration attempts.  However, the BT110 device will make a new registration attempt under the following conditions Note 1:

  1. One or more SIP parameters or SIP credentials is/are changed.
  2. The BT110 device is power cycled.
  3. The user attempts to make a call by pressing the (red) Phone LED/button or picking up the FXS port analog phone.  

Note 1: The description given in this article applies to BT110 software version v1.0.7.7 and above.

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