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SIP: Invalid header value



WARNING: 32112

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WARNING

The header you asked Twilio to stamp was omitted because it contains illegal characters in its value. Including this header would have resulting in Twilio generating a message that runs contrary to the SIP specification.

Possible Causes

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  • If you specified headers in a SIP URI, invalid characters were most likely introduced by an escaped character. Escaped characters in SIP URIs are defined by a percent sign (%) followed by two hexadecimal digits specifying a character code.
  • If you are generating SIP headers from user input, ensure your application properly accounts for non-alphanumeric characters such as punctuation and whitespace, as well as international characters.

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