InHand InGateway502, User Manual

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a backup server. After two servers are configured, the gateway probes the
primary server first. It probes the secondary server only when the number of
probe retries on the primary server reaches the maximum value. If both the
servers fail to be detected, the gateway dials up again and starts a new round
of ICMP probe.
o
ICMP Detection Interval: specifies the interval between ICMP probe packets
sent from the gateway.
o
ICMP Detection Timeout: specifies the timeout period of an ICMP probe. If
the gateway does not receive any ICMP Reply packet within this period, it
considers that the ICMP probe times out.
o
ICMP Detection Max Retries: specifies the maximum number of retries after
an ICMP probe failure. (The gateway dials up again when the number of
retries reaches this value.)
o
ICMP Detection Strict: enables or disables the strict ICMP probe mode. In this
mode, the gateway does not send ICMP probe packets when its dial-up
interface is transmitting data traffic. It sends ICMP probe packets only when
the dial-up interface is idle.
Advanced Settings
o
Initial Commands: specifies some AT commands used to check the module
status.