LTE band lock

From Wiki Knowledge Base | Teltonika SAS

Frequency band lock

Frequency bands can be locked with the AT+QCFG=“band” command. The syntax for the command looks like this:

gsmctl -A 'AT+QCFG=“band”[,<bandval>,<ltebandval>,<tdsbandval>[,<effect>]]'

Where:

  • <bandval> - a hexadecimal value that specifies the GSM and WCDMA frequency band. Possible values are:
    00000000    No change
    00000001    GSM900
    00000002    GSM1800
    00000004    GSM850
    00000008    GSM1900
    00000010    WCDMA 2100
    00000020    WCDMA 1900
    00000040    WCDMA 850
    00000080    WCDMA 900
    00000100    WCDMA 800
    00000200    WCDMA 1700
    0000FFFF    Any frequency band
  • <ltebandval> - A hexadecimal value that specifies the LTE frequency band. Possible values are:
    0                No change
    0x1              (CM_BAND_PREF_LTE_EUTRAN_BAND1)     LTE BC1 (2100MHz)
    0x4              (CM_BAND_PREF_LTE_EUTRAN_BAND3)     LTE BC3 (1800MHz)
    0x10             (CM_BAND_PREF_LTE_EUTRAN_BAND5)     LTE BC5 (850MHz)
    0x40             (CM_BAND_PREF_LTE_EUTRAN_BAND7)     LTE BC7 (2600MHz)
    0x80             (CM_BAND_PREF_LTE_EUTRAN_BAND8)     LTE BC8 (900MHz)
    0x800000         (CM_BAND_PREF_LTE_EUTRAN_BAND20)    LTE BC20 (800MHz)
    0x40000000       No change
    0x1a0000800d5    (CM_BAND_PREF_ANY)                  Any frequency band
  • <tdsbandval> - a hexadecimal value that specifies the TDS-CDMA frequency band. Possible values are:
    0             No change
    0x1           (CM_BAND_PREF_TDS_BANDA)    TDS BCA
    0x2           (CM_BAND_PREF_TDS_BANDB)    TDS BCB
    0x4           (CM_BAND_PREF_TDS_BANDC)    TDS BCC
    0x8           (CM_BAND_PREF_TDS_BANDD)    TDS BCD
    0x10          (CM_BAND_PREF_TDS_BANDE)    TDS BCE
    0x20          (CM_BAND_PREF_TDS_BANDF)    TDS BCF
    0x40000000    No change
  • <effect> - specifies when to take effect. Possible values are:
    0    Take effect after reboot
    1    Take effect immediately

Examples


gsmctl -A 'AT+QCFG="band",0,40,0,1'


3. Start mobile data connection:

   ifup ppp


Additionally:


To read used frequencies:

   gsmctl -A 'AT+QCFG="band"'
   +QCFG: "band",0xd3,0x40,0x0



To read used frequencies in words format:

   gsmctl -A AT+QNWINFO


to set exact bands:

   gsmctl -A 'AT+QCFG="band",0,40,0,1'
   OK   


Multiple frequencies at one time:

It's not force one band, when you use AT+QCFG="band" and set

any combinations of band you need to use, for <ltebandval> 1800 is band 3,

and it's config is 4, and 2600 is band 7, it's config is 40, so you sum this

two and it will be 44, so you need to set <ltebandval> as 44.