Showing/Hiding Your Phone NumberWhen you (Web site design and hosting) right-click a contact
Showing/Hiding Your Phone NumberWhen you right-click a contact in your Windows Messenger list and chooseProperties, you see some basic information about that person in a Propertiesdialog box. That information might, or might not, include the contact s phonenumber. You can choose whether or not to make your own phone number visi- ble to your contacts by clicking the Phone tab in Windows Messenger s dialogbox. To make phone numbers visible to your contacts, choose a Country/ Region Code from the drop-down list. Then type any phone numbers you wantto make visible. To prevent contacts from seeing your phone numbers, leaveall the options empty. Windows Messenger Phone CallsThe Phones tab in Windows Messenger s Options dialog box allows you to setup alternative communications services that can work with Windows Messenger. There are two types of services you can add, though neither is free, nor simple: .SIP Communications Service:Session Initiative Protocol (SIP) is atechnology used by some corporations to allow employees to placetelephone calls over the Internet. If your company has this capability, your network administrator can configure your copy of WindowsMessenger to work with SIP. .Exchange Instant Messaging:Companies that have MicrosoftExchange 2000 installed can configure instant messaging so thatmembers of a local network can communicate with another withWindows Messenger. Both services require products and expertise that go beyond Windows XP andthe scope of this book. To learn more about SIP and making telephone callsthrough Windows Messenger, choose Help.Help Topics from WindowsMessenger s menu bar. Then click the Search tab and search for SIPorExchange. However, network administrators need to be aware that the optionsfor configuring SIP, Exchange, and other basic information about your Internetconnection are on the Accounts and Connection tabs in Windows Messenger sOptions dialog box. Conversations versus Telephone CallsAnyone with a computer, sound card, speakers, and a microphone can havevoice conversations using the techniques described under Toll-Free Talking, earlier in this chapter. Those voice conversations always involve two or morecomputers (no telephones) and are always free of charge. Telephone conversations are different in several ways. For one thing, there s a stan- dard telephone, a cell phone, or some other noncomputer communications deviceinvolved in the conversation. For another, telephone calls are never free of charge. In fact, you can t even use Windows Messenger to make phone calls unless yousign up with a Serial Information Protocol (SIP) Communications Service.
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