Specifications

Chapter 2 – Configuration Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 40
<rbp> Preferred Radio Band(s)
The write command will trigger the band selection, starting with the user
preference specified by <rbp>. This means bands contained in <rbp> will be
searched first, regardless of the standard band combination of the current
country. The final result of the band selection can be read from <rbc>.
If <rbp> was a band or band combination which differs from the standard
band(s) and the requested band(s) are not visible at the air interface the ME
reverts to the standard band(s) of this country. Please note that the band
selection procedure is independent of the registration procedure, i.e. the ME
selects a band no matter whether or not there is a PLMN (Public Land Mobile
Network) the ME can register to. So, if the <rbp> was a band or band
combination supported by the country, but currently no PLMN can be found,
the ME will select the "preferred" band (indicated by <rbc>) without registering
to the network. To avoid registration problems, for example when the settings
are configured for testing the GSM application it is recommended that the
tester first activates the desired band(s) on the test equipment and then
executes the AT^SCFG write command.
Besides remember that the network registration also depends on the settings
made with AT+COPS. The <rbp> is volatile and cannot be read back with the
AT^SCFG read command. This is because the value is used only for triggering
one single search operation.
The parameter <rbp> may be one of the single bands or one of the four dual
band combinations listed below.
All preferred bands must be contained in the range of allowed bands set with
<rba>, invalid combinations are not accepted. To give priority to a certain
single band or band combination and suppress all others simply select the
same value both for <rbp> and <rba>.
1 GSM 900 MHz
2 GSM 1800 MHz
4 GSM 1900 MHz
8 GSM 850 MHz
3 GSM 900 MHz + GSM 1800 MHz
5 GSM 900 MHz + GSM 1900 MHz
10 GSM 850 MHz + GSM 1800 MHz
12 GSM 850 MHz + GSM 1900 MHz
15 GSM 900 MHz + GSM 1800 MHz + GSM 850 MHz + GSM 1900 MHz
<rbc> Currently Selected Radio Band(s)
<rbc> is the single band or dual band combination currently used by the ME,
found either by the automode algorithm or after the network search was
triggered with <rbp>. The <rbc> value is saved on power down.
When restarted next time the ME tries to select the same band(s) if these are
visible. If the band(s) stored with <rbc> are not visible the ME uses the
standard band(s) of the current country and consequently updates the <rbc>
value.
<rbc> is only a response parameter returned either after sending the read
command AT^SCFG? or writing AT^SCFG="Radio/Band".
In addition to <rbc> and to allow the subscriber to be notified whenever the
selected band changes it is recommended to activate the "+CIEV: band" (see
Section 3.3, AT^SIND).
1 GSM 900 MHz
2 GSM 1800 MHz
4 GSM 1900 MHz
8 GSM 850 MHz
3 GSM 900 MHz + GSM 1800 MHz
5 GSM 900 MHz + GSM 1900 MHz
10 GSM 850 MHz + GSM 1800 MHz
12 GSM 850 MHz + GSM 1900 MHz
15 GSM 900 MHz + GSM 1800 MHz + GSM 850 MHz + GSM 1900 MHz