LevelOne VOI-7100 - Manual (Page 52)

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ICMP Setting
The ICMP function is to echo when someone ping this device. This can prevent
from hacker attacking the device by not echoing.
ICMP Not Echo ICMP is used to acknowledge and echo
for the Ping request. IP Phone will echo
for the IP Ping request at default.
Selecting ON for ICMP Not Echo will
ignore the IP Ping request and keep silent.
This is sometime useful for network
security.
3.6. User Password
You may create the login name and password in this page.