Mobile Wan Connection Configuration - Advantech B+B SmartWorx LR77 v2 Configuration Manual

Item Description
PIN Specifies the PIN used to unlock the SIM card. Use a PIN parameter
only if the network requires a SIM card router. The SIM card is blocked
after several failed attempts to enter the PIN.
MRU Specifies the Maximum Receive Unit which is the maximum size of a
packet that the router can receive in a given environment. The default
value is 1500 B. Other settings can cause the router to incorrectly trans-
mit data. Minimal value is 128 B.
MTU Specifies the Maximum Transmission Unit which is the maximum size
of a packet that the router can transmit in a given environment. The de-
fault value is 1500 B. Other settings can cause the router to incorrectly
transmit data. Minimal value is 128 B.
Table 19: Mobile WAN Connection Configuration
The following list contains tips for working with the Mobile WAN configuration form:
If the MTU size is set incorrectly, then the router does not exceed the data transfer. When
you set the MTU value low, more frequent fragmentation of data occurs. More frequent
fragmentation means a higher overhead and also the possibility of packet damage during
defragmentation. On the contrary, a higher MTU value can cause the network to drop
the packet.
If the IP address field is left blank, when the router establishes a connection, then the
mobile network carrier automatically assigns an IP address. If you assign an IP address,
then the router accesses the network quicker.
If the APN field is left blank, then the router automatically selects the APN using the IMSI
code of the SIM card. If the PLMN (operator number format) is not in the APN list, then
the router uses the default APN "internet". If AT&T carrier network is detected, "phone"
is used as default APN. The mobile network carrier defines the APN.
If you enter the word blank in the APN field, then the router interprets the APN as blank.
ATTENTION:
If the router has only one SIM card slot, it switches between the APN options.
A router with two SIM card slots switches between the SIM cards.
The correct PIN must be filled in. SIM cards with two APNs will use the same
PIN for both APNs. An incorrect PIN can block the SIM card.
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3. CONFIGURATION