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ISDN Dial Backup Setup
WAN Connection
Detection
RIP Protocol
Modulation –Default setting is Multimode. Choose the one
that fits the requirement of your router.
This setting is only available for the router supporting
ISDN function.
Before utilizing the ISDN dial backup feature, you must
create a dial backup profile first. Please click ISDN >
Dialing to a Single ISP to create the backup profile.
None - Disable the backup function.
Packet Triggering -The backup line is not on until a packet
from a local host triggers the router to establish a
connection.
Always On - If the broadband connection is no longer
available, the backup line will be activated automatically
and always on until the broadband connection is restored.
We recommend you to enable this feature if you host a web
server for your customers' access.
Such function allows you to verify whether network
connection is alive or not through ARP Detect or Ping
Detect.
Mode – Choose ARP Detect or Ping Detect for the system
to execute for WAN detection.
Ping IP – If you choose Ping Detect as detection mode, you
have to type IP address in this field for pinging.
TTL (Time to Live) – Displays value for your reference.
TTL value is set by telnet command.
Routing Information Protocol is abbreviated as RIP
（RFC1058）specifying how routers exchange routing
tables information. Click Enable RIP for activating this
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Vigor2850 Series User's Guide
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