Overdialling occurs when a person dials a phoneword that is longer than the standard length of a 1300, 13 or 1800 phone number.
Here’s an example:
Most 1300 numbers have a 10-digit primary number. If you dial 1300 MR PHONEWORDS you are actually dialling a 12-digit number (1300 677 466 396 737). Phonewords allow for this by giving a business an extra 2 to 4 numbers. The extra numbers are effectively “ignored” by the phone carrier who reads only the first 6-10 digits pressed hence bringing the phone number back in line with the standard phone number length.
Here is a quick overview of overdialling allowances on phonewords:
Standard length of word (letters)
Extra letters allowed (overdialling)
Can I receive International calls to my Phoneword from outside of Australia?
In this instance, the caller is responsible for paying the international part of the call to Australia, and you are responsible for paying for the national part of the call - so it is very cost effective for Australian businesses.