Trunks and target lines / 79P0992638 03 Modular ICS 6.0 Installer GuideBRI trunksBRI trunks give you incoming and outgoing access to an ISDNnetwork. Like loop start trunks, they can be configured asmanual-answer or auto-answer. See Ans mode on page 341.BRI trunks provide a fast, accurate, and reliable means ofsending and receiving data, images, text, and voiceinformation. Using BRI lines allows for faster transmissionspeeds and the addition of a variety of powerful businessapplications, including remote LAN access, videoconferencing, file transfer and Internet access.For more information see Welcome to ISDN on page 37.Note Profile 2: European BRI trunks can be either EURO orSL-1.PRI trunksPRI trunks are used for incoming and outgoing calls over anISDN network. PRI trunks are automatically set to auto-answer.Incoming calls are routed to system telephones throughassigned target lines. Outgoing calls are made using theintercom key, which connects to a line pool, or by entering adestination code, which defines a route for the call.PRI Sl-1 lines also can provide MCDN network functionalityover a private network between other Norstar systems,Meridian 1 systems, or Business Communications Systems, ifthe appropriate keycode has been installed. Private networkingis described in Networking with Norstar on page 91.