Proroute GEM420 4G M2M Router
GEM420 User Manual
35
1.
WAN Type
: Choose “3G/4G” from the drop list.
1.
Preferred SIM Card
: Choose “SIM-A”, “SIM-B”, “SIM-A First” or “SIM-B First” for
3G/4G connection. There are two SIM card slots on this gateway and with four
kinds of SIM card usage scenarios, including "SIM-A", "SIM-B", “SIM-A First” and
"SIM-B First“. By default, “SIM-A First” scenario is used to connect to mobile
system for data transferring. If use “SIM-A First” scenario, the gateway will try to
connect to the Internet by using SIM-A card first. And when the connection is
broken, gateway system will switch to use SIM-B card for an alternate
automatically. System will not switch back to use SIM-A card unless SIM-B
connection is also broken. That is, SIM-A and SIM-B are used iteratively, but
either one will keep being used for data transferring when current connection is
still alive. In the same way, the gateway will try to connect to the Internet by
using SIM-B card first if choosing “SIM-B First”. However, when “SIM-A” or
“SIM-B” is used, that means the specified SIM slot of card is the ONLY one to be
used for negotiation parameters between gateway device and mobile base
station.
When you select “SIM-A First” or “SIM-A”, there will be SIM-A Configuration
beneath the 3G/4G WAN Type configuration window. However, when you select
“SIM-B First” or “SIM-B”, there will be SIM-B Configuration beneath the 3G/4G
WAN Type configuration window. All configuration items are the same in SIM-A
and SIM-B Configuration. There is also a common configuration for 3G/4G
connection.
