Prohibit control characters on SIP lines

This prevents the dialing of control characters. Control codes can, for example, be used to configure call forwarding. You can prevent this for any particular lines or persons. For example, proceed as follows to reject the character '#':

  1. Under Called number: enter ##.
  2. Under Destination number: enter #.
  3. For the Destination line select REJECT.
  4. Enter a Comment:, e.g. "No numbers beginning with #".
  5. Confirm your settings by clicking the OK button.

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