Hughes Direcway DW6000, Installation Manual

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Appendix D • Installing VADB
1033295-0001 Revision A
149
Appendix D
Installing VADB
This appendix discusses:
•
Overview on page 149
•
VADB pre-installation on page 150
•
Installation procedure on page 150
•
DW6002 LED appearance during VADB operation on
page 156
•
Troubleshooting VADB on page 157
Overview
The Virtual Private Network (VPN) Automatic Dial Backup
(ADB) (VADB) feature provides a backup infrastructure to the
DW6002 should the satellite link fail or degrade below an
acceptable threshold.
The DW6002 contains an internal modem to support VADB
functionality. The DW6002 connects to a national network of dial
access numbers, which are known as a Points of Presence (POP).
Each POP acts as a Virtual Private Network (VPN) entry point
into the customer’s network or the Internet. Packets are sent from
the DW6002 through the POP to the Network Operations Center
(NOC), which forwards the packets to the destination server.
VADB automatically switches the DW6002 to a terrestrial dial-up
telephone network with minimal interruption and loss of
customer traffic. VADB introduces no additional load on the
DW6002 and does not affect any existing DW6002 features, but it
will make the DW6002 send and receive traffic at a slower rate.