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Advanced
The advanced settings might be useful for some network
requirements. 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.