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Possible causes: The server may conflict with some softphone VBPhone or App settings for Android or iOS.
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Error code: #SIP. RFC.420
SIP error code: 420 BAD EXTENSION
Possible causes: Our servers may be in trouble or the Softphone App for Android or iOS may be malfunctioning.
Steps for correction: Close the Softphone or App and run again. If the problem persists, restart the device and try running one more time.
If the error still persists, please contact our technical team.
Internal error: 421 EXTENSION REQUIRED
Error code: #SIP. RFC.421
SIP error code: 421 EXTENSION REQUIRED
Possible causes: Our servers may be in trouble or the Softphone App for Android or iOS may be malfunctioning.
Steps for correction: Close the Softphone or App and run again. If the problem persists, restart the device and try running one more time.
If the error still persists, please contact our technical team.
Very short registration interval: 423 INTERVAL TOO BRIEF
Error code: #SIP. RFC.423
SIP error code: 423 INTERVAL TOO BRIEF
Possible causes:
The registration interval configured on the Softphone or App for Android or iOS is very short.
Servers may be momentarily in technical trouble;
The Softphone App for Android or iOS may not be working properly.
What to do: Enter a compatible registration period (default 3600 seconds).
If the problem persists, try restarting your device and running one more time.
If the error still persists, talk to our technical team.
Internal error: 481 CALL TRANSACTION DOES NOT EXIST
Error code: #SIP. RFC.481
SIP error code: 481 CALL TRANSACTION DOES NOT EXIST
Possible causes: Our servers may be in trouble or the Softphone App for Android or iOS may be malfunctioning.
Steps for correction: Close the Softphone or App and run again. If the problem persists, restart the device and try running one more time.
If the error still persists, please contact our technical team.
Internal error: 482 LOOP DETECTED
Error code: #SIP. RFC.482
SIP error code: 482 LOOP DETECTED
Possible causes: Our servers may be in trouble or the Softphone VBPhone or App for Android or iOS may be malfunctioning.
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