Draytek Vigor2920 Series User Manual page 148

Item
Modem Support List
After finishing all the settings here, please click OK to activate them.
Vigor2920 Series User's Guide
Description
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.
It lists all of the modems supported by such router.
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