Operation Manual

The individual features of the NT/MPRI
NT/MPRI – 1 Introduction 8
The AVM MultiProtocol Router for ISDN/DSL connects physically distant
networks. LAN resources at the central office, such as the servers,
mainframes, SAP R/3 systems or databases, are thus also available at
branch offices of all sizes. A great advantage is that the NT/MPRI auto-
matically takes over any necessary routing activities like connection
control so that no additional tasks must be performed by the user.
Communication in the other direction is also possible, of course, such
that the local networks of the branch offices can be accessed from
headquarters, for instance, to administer the network or to update the
databases stored there.
The NT/MPRI also supports access to the Internet in a variety of ways,
granting to all users in the LAN and the WAN access to Internet resourc-
es like E-mail, World Wide Web, news and more through one or multi-
ple dial-in or leased ISDN lines or via ADSL. The NT/MPRI also supports
combinations with E-mail servers, proxies or Web servers.
The NT/MPRI supports the open standard PPP over ISDN (Point-to-
Point Protocol) for ISDN connections from local networks. This means
that the NT/MPRI can establish connections with all other ISDN routers
that support this standard. For ADSL Internet routing, PPPoE (PPP over
Ethernet) is supported.
1.2 The individual features of the NT/MPRI
The following section offers a short overview of the features of the
NT/MPRI.
Optimum ISDN Utilization
The ISDN digital communications network provides a number of fea-
tures which offer enormous advantages for connecting to networks and
to the Internet. The NT/MPRI exploits these features optimally.
The fast connections times in ISDN of less than one second allow the
dynamic establishment and clearing of ISDN connections in the back-
ground, thus saving connection costs.
The ISDN feature “CLIP” (Calling Line Identification Presentation), the
transmission of a caller’s ISDN number over the D channel, allows the
NT/MPRI to check the identity of the remote site.
The ISDN B channels can be bundled in order to increase transmission
speeds; channels can even be combined from multiple ISDN-Control-
lers. Because one to four AVM ISDN-Controllers B1 or one ISDN Control-
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