In order to insert a pause in a phone number, simply write a comma [,]
To insert a wait, simply hit exclamation mark [!]
When you dial a phone number that contains a pause, the device pauses for two seconds before it dials the remaining numbers. When dialing a phone number that contains a wait, the device displays a Dial Extension screen prompting you to either dial the remaining numbers, skip the remaining numbers, or end the call.