The mods want you to get used to finding documentation. It's truly amazing what you find in the instructions. Best to download the PDF and print it up and keep it in a binder. I like the PDF because I can do searches plus keep a copy on my laptop and take it to sites. The customer does not now you are thumbing through a manual that way, either.

https://support.avaya.com/japple/cs...p;temp.bucketID=159898&PAGE=Document

The funtion is #209. Use the next data key to change the value and the next item to change lines. It will give you a little sample sound for each one as you select it.