Question

Hi,
with TRB140 is it possible to choose and lock the LTE favorite band (B1, B2.....B30...)?

Thanks!

Answer 1

Hey,

We have this feature planned in future firmware updates, most likely in 02.05 release. At the moment it is only possible to configure band lock via CLI using AT commands.

Please follow these steps for bandlock via SSH:

• Stop mobile data connection:

ifdown mob1s1a1

• Select desired bands:

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

<bandval> A hexadecimal value that specifies the GSM and WCDMA frequency band. If set <bandval> to 0, it means not to change GSM and WCDMA frequency band. (eg.: 00000013=00000001(GSM900)+00000002(GSM1800)+00000010(WCDMA2100))

    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. If set <ltebandval>

to 0 or 0x40000000, it means not to change LTE frequency band. (eg.:0x15=0x1( LTE BC1)+0x4( LTE BC3)+0x10( LTE BC5))
0x1 (CM_BAND_PREF_LTE_EUTRAN_BAND1) LTE BC1
0x4 (CM_BAND_PREF_LTE_EUTRAN_BAND3) LTE BC3
0x10 (CM_BAND_PREF_LTE_EUTRAN_BAND5) LTE BC5
0x40 (CM_BAND_PREF_LTE_EUTRAN_BAND7) LTE BC7
0x80 (CM_BAND_PREF_LTE_EUTRAN_BAND8) LTE BC8
0x800000 (CM_BAND_PREF_LTE_EUTRAN_BAND20) LTE BC20
0x1a0000800d5 (CM_BAND_PREF_ANY) Any frequency band

 
<tdsbandval> A hexadecimal value that specifies the <tdscdma> frequency band. If set
 

<tdsbandval> to 0 or 0x40000000, it means not to change TDS-CDMA frequency band. (eg.: 0x21=0x1( TDS BCA) +0x20( TDS BCF))
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

<effect> When to take effect

0 Take effect after UE reboots

1 Take effect immediately

• Example:

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

•  Start mobile data connection:

ifup mob1s1a1

•  To read used frequencies:

    gsmctl -A 'AT+QCFG="band"'       or      +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'

• 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.

 

• Any frequency:

0x1a0000800d5

Comments

Perfect.....thanks.