how to set number of rings before my greeting message plays

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I want 20 rings or more

[FuzzyLogic · Accepted solution]

This may be of use:

Change Number of Rings Before Voicemail Picks Up

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Thanks, I didn't know what Voice Mail Access Number was. The linked reference page doesn't provide a link or a help bubble for its definition, nor does it allow copy paste to go into Google with it. Pretty sad for an outfit the size of Telus!