Authentication
When a call is received, the calling party number is always sent over the ISDN D channel.
This number enables your device to identify the caller (CLID), provided the caller is entered
on your device. After identification with CLID, your device can additionally carry out PPP
authentication with the connection partner before it accepts the call. Your device needs the
necessary data for this, which you should enter here. First establish the type of authentica-
tion process that should be performed, then enter a common password and two codes. You
get this information, for example, from your Internet Service Provider (ISP) or the system
administrator at your head office. If the data you entered on your device is the same as the
caller's data, the call is accepted. The call is rejected if the data is not the same.
Default Route
With a default route, all data is automatically forwarded to one connection if no other suit-
able route is available. If you set up access to the Internet, you must configure the route to
your Internet Service Provider (ISP) as a default route. If, for example, you configure a cor-
porate network connection, only enter the route to the head office or branch office as a de-
fault route if you do not configure Internet access over your device. If, for example, you
configure both Internet access and a corporate network connection, enter a default route to
the ISP and a network route to the head office. You can enter several default routes on
your device, but only one default route can be active at any one time. If you enter several
default routes, you should make sure the values for Metric are different.
Activating NAT
With Network Address Translation (NAT), you conceal your whole network to the outside
world behind one IP address. You should certainly do this for your connection to the Inter-
net Service Provider (ISP).
Only outgoing sessions are allowed initially if NAT is activated. To allow certain connec-
tions from outside to hosts within the LAN, these must be explicitly defined and admitted.
Callback
The callback mechanism can be used for every connection to obtain additional security re-
garding the connection partner or to clearly allocate the costs of connections. A connection
is not set up until the calling party has been clearly identified by calling back. Your device
can answer an incoming call with a callback or request a callback from a connection part-
ner. Identification can be based on the calling party number or PAP/CHAP/MS-CHAP au-
thentication. Identification is made in the former case without call acceptance, as the calling
party number is transferred over the ISDN D channel, and in the latter case with call ac-
Funkwerk Enterprise Communications GmbH
10 WAN
bintec R200 Series
183
