-31-DTMF On or OffSince the ability to communicate withautomated systems is frequentlyneeded, you can usually set and main-tain the DTMF tone transmit selection toon. If you use the phone scratchpad fea-ture (see “Dialing a phone number onnotepad” on page 8) to key in a phonenumber during a call in progress, youcan turn off the DTMF selection, asneeded, to avoid generating audibletones that can be disruptive during aphone conversation.Text MessageRoll Off OrderAs described in “Text Messages” on page 25,your phone can receive text messages if textmessaging service is available through your cel-lular service provider. When the phone text mes-sage storage is full and more text messages aredelivered, existing messages are automaticallyreplaced with the new messages. The order inwhich the existing messages are replaced,referred to as roll off order, can be selectedbased on message arrival time or messageurgency.?Example of Communicating with An AutomatedSystem Using DTMF Touch TonesTo contact your credit card company for account balance informa-tion, you dial the phone number. The credit card automated systemanswers by prompting you to enter the account number. If the DTMFtones selection in your phone is set to on, you can successfully com-municate with the automated system. If the DTMF tones selection inyour phone is set to off, then the automated system cannot recognizeany number entries.C a ll P la ce d to C re d itC a rd C o m p a n yE X: {1 80 0 6 37 5 9 17 }C re d it C a rd C om p a n yP ro m p t fo r A cco u n t N o .E X: {E nter A ccou n t N u m b e r}A c co u n t N u m b e r E n te re dU sin g P h o ne K e ysE X: {4 44 4 5 55 5 6 66 6 1 11 1 }DTMF On:S y ste mR e sp o n seDTMF Off:N o S ys te mR e sp o n seMenu ShortcutM43Menu ShortcutM431