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8
DUAL SIM FUNCTIONALITY
FM5500 is able to operate in DUAL SIM switching mode to minimize the bill accounts for
GSM/GPRS services. To use this mode, 2 SIM Operator list enumerated value must be chosen for
Profile Change On setting in Global parameters tab after FM5500 is connected to configurator
(shown in Figure 48).
When DUAL SIM operating mode is set: profile 1 becomes Home, profile 2 becomes SIM 1
Roaming, profile 3 becomes SIM 2 Roaming and profile 4 becomes Unknown Operator. In this
chapter the operation and configuration of DUAL SIM mode is presented.
FM5500 can be used with one SIM. SIM1 card has higher priority than SIM2. For one SIM
card using it must be placed in SIM1 slot for FM5500 to switch minimum times.
If SIM card is inserted into SIM 2 slot and 1 SIM operator list mode is used, FM5500 will
work normally, but there will be more switching activities. In addition, APN settings in Global
parameters should be entered for SIM 1 and SIM 2 to avoid not sending records over GPRS.
When FM5500 connected to configurator choose Global Parameter section as shown on
Figure 48 FM55XX Configurator window 2SIM mode setup, then in Profile Change ON select 2
SIM Operator List.
Figure 48 FM55XX Configurator window 2SIM mode setup
You can see four new profiles buttons after changing to 2 SIM Operators list: Home, SIM 1
Roaming, SIM 2 Roaming and Unknown Operator.
SIM 1 and SIM 2 APN settings are set in the Global parameters tab (Figure 49). Some
operators use specific authentication for GPRS session – CHAP or PAP. If any of these is used,
APN should be entered as ‘
chap:
<APN>
’ or ‘
pap:
<APN>
’. I.e. if operator is using APN ‘internet’
with CHAP authentication, it should be entered as ‘
chap:
internet
’. Information about APN
and authentication type should be provided by your GSM operator.
