Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 137)

Chapter 13 – Specific AT Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 137
Multi-Band Selection +WMBS
Description: Use this command to select the GSM bands on which the modem will work. This command is allowed
only if the selected bands are supported.
You can choose whether the change is immediate or not:
• Either the modem has to be reset to take this change into account (this is the default)
• or the GSM stack restarts immediately on the specified band(s). In this mode, the command
+WMBS is forbidden during the initialization phase of the modem and during calls.
Values: frequency band configuration to be supported
0 mono-band mode 850 MHz
1 mono-band mode 900 MHz
2 mono-band mode 1800 MHz
3 mono-band mode 1900 MHz
4 dual-band mode 850/1900 MHz
5 dual-band mode 900E (extended) /1800 MHz
6 dual-band mode 900E (extended) /1900 MHz
indicates the type of change
0 the modem will have to be reset in order to start on the specified band(s). is set
to 1.
1 the change is effective immediately. The GSM stack is restarted with the specified band(s).
stays at 0. This mode is forbidden whil in communication and during modem
initialization.
Note: If is not given, the modem has to be reset to start on the specified band(s), as for
=0.
0 the feature was not modified since the last boot of the product
1 the feature has been modified since the last boot of the product; it has to be reset in order to
take the modification into account. This is the case when the band was changed with
“AT+WMBS=” or “AT+WMBS=,0”
Syntax: Command Syntax: AT+WMBS=[,]
Response Syntax: +WMBS: ,
Command Possible responses
AT+WMBS= OK
Note: The modem has to reset for the change to be effective
AT+WMBS=,0 OK
Note: The modem has to reset for the change to be effective
AT+WMBS=,1 OK
Note: Band mode selected and GSM stack restarted
AT+WMBS=
+CME ERROR: 3
Note: Band not allowed
AT+WMBS? +WMBS:,
OK
Note: Current selected band mode is returned.
AT+WMBS=? WMBS: (0,3,4),(0-1)
OK
Note: Only 850 mono-band or 850/1900 bi-band are available
AT+WMBS=?
WMBS: (01,2,3,4,5,6),(0-1)
OK
Note: All bands are available