Advantech ICR-1601 - SIM Card Reader

ICR-1601
22
MTU Setup
1. An Optional setting
2. Uncheck by default
Check the Enable box to enable the MTU (Maximum Transmission Unit)
limit, and specify the MTU for the 3G/4G connection.
MTU refers to Maximum Transmission Unit. It specifies the largest packet
size permitted for Internet transmission.
Value Range: 1200 ~ 1500.
MTU Setup
1. A Must filled
setting
2. Auto (value zero)
is set by default
3. Manual set range
1200~1500
MTU refers to Maximum Transmission Unit. It specifies the largest packet
size permitted for Internet transmission.
When set to Auto (value ‘0’), the router selects the best MTU for best
Internet connection performance.
NAT
1. An optional setting
2. NAT is enabled by
default
Enable NAT to apply NAT on the WAN connection. Uncheck the box to
disable NAT function.
Network Monitoring
1. An optional setting
2. Enabled by default
When the Network Monitoring feature is enabled, the gateway will use
DNS Query or ICMP to periodically check Internet connection –connected
or disconnected.
 Choose either DNS Query or ICMP Checking to detect WAN link.
With DNS Query, the system checks the connection by sending DNS
Query packets to the destination specified in Target 1 and Target 2.
With ICMP Checking, the system will check connection by sending
ICMP request packets to the destination specified in Target 1 and
Target 2.
 Loading Check
Enable Loading Check allows the router to ignore unreturned DNS
Queries or ICMP requests when WAN bandwidth is fully occupied.
This is to prevent false link-down status.
 Check Interval defines the transmitting interval between two DNS
Query or ICMP checking packets.
 Check Timeout defines the timeout of each DNS query/ICMP.
 Latency Threshold defines the tolerance threshold of responding
time.
 Fail Threshold specifies the detected disconnection before the
router recognize the WAN link down status. Enter a number of
detecting disconnection times to be the threshold before
disconnection is acknowledged.
 Target1 (DNS1 set by default) specifies the first target of sending
DNS query/ICMP request.
 DNS1: set the primary DNS to be the target.
 DNS2: set the secondary DNS to be the target.
 Gateway: set the Current gateway to be the target.
 Other Host: enter an IP address to be the target.
 Target2 (None set by default) specifies the second target of
sending DNS query/ICMP request.
 None: to disable Target2.
 DNS1: set the primary DNS to be the target.
 DNS2: set the secondary DNS to be the target.
 Gateway: set the Current gateway to be the target.
 Other Host: enter an IP address to be the target.
IGMP
1. A Must filled setting
2. Disable is set by
default
Enable IGMP (Internet Group Management Protocol) would enable the
router to listen to IGMP packets to discover which interfaces are
connected to which device. The router uses the interface information
generated by IGMP to reduce bandwidth consumption in a multi-access
network environment to avoid flooding the entire network.