1 Introduction and preparation How to get helpNN47928-311 14SIP – Session Initiation Protocol is the most popular protocol used with VoIP. Thephones you use with the BSGX4e are likely marked as “SIP phones.”VoIP – Voice over Internet Protocol is a digital telephone service that uses the publicInternet instead of the traditional analog telephone network.WAN – A Wide Area Network is a technical term for the network of servers and otherdevices on the Internet with which you will connect.How to get helpThis section explains how to get help for Nortel products and services.Getting help from the Nortel Web siteThe best way to get technical support for Nortel products is from the NortelTechnical Support Web site:www.nortel.com/supportThis site provides quick access to software, documentation, bulletins, and toolsto address issues with Nortel products. More specifically, the site enables you to:• download software, documentation, and product bulletins• search the Technical Support Web site and the Nortel Knowledge Base for answers totechnical issues• sign up for automatic notification of new software and documentation for Nortelequipment• open and manage technical support casesGetting help over the phone from a Nortel Solutions CenterIf you do not find the information you require on the Nortel Technical SupportWeb site, and have a Nortel support contract, you also get help over the phonefrom a Nortel Solutions Center.In North America, call 1-800-4NORTEL (1-800-466-7835).Outside North America, go to the following web site to obtain the phone numberfor your region:www.nortel.com/callus