8-16
Configuring Demand Routing for Primary ISDN Modules
Using Demand Routing for ISDN Connections
Table 8-3. Supported ISDN Standards
Using Demand Routing for ISDN
Connections
When you lease an ISDN line, you pay only for the time when the connection
is established. If no one is sending traffic that must be transmitted over the
dial-up WAN connection, you do not want the connection to be up. However,
as soon as a user sends data that must be transmitted over the dial-up WAN
connection, you want that connection to be established immediately.
When you purchase primary ISDN modules for the ProCurve Secure Router,
you configure demand routing to manage the ISDN connection so that when
traffic is sent from one site to another the dial-up connection is established.
For example, you might lease an ISDN line to connect a branch office to the
main office. When a workstation at the branch office sends a packet that must
be forwarded to the main office, demand routing triggers the ISDN connection
and ensures that the traffic is forwarded across the established link. If no more
traffic is transmitted from the branch office to the main office, demand routing
ensures that the ISDN connection is terminated until it is required again. (See
Figure 8-5.) If you configure demand routing correctly, you can minimize the
amount your company pays for its ISDN connection.
Ty pe Switch Types Classifications Electrical
ISDN BRI S/T module • National ISDN-1
• Northern Telecom DMS-
100
• AT&T 5ESS
• DSS1 ETSI Euro-ISDN
• ACIF S031
•ETSI TBR 3
• EN 60950
• IEC 60950
• AS/NZS 60950
• V.54 loopback support
• FCC Part 15 Class A
• EN 55022 Class A
• EN 55024
• EN 61000-3-2
• EN 61000-3-3
ISDN BRI U module • National ISDN-1
• Northern Telecom DMS-
100
• AT&T 5ESS
• ACTA/FCC Part 68
• IC CS-03
• UL/CUL 60950
• V.54 loopback support
• FCC Part 15 Class A
• EN 55022 Class A
• EN 55024
• EN 61000-3-2
• EN 61000-3-3
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