Page 1 of 1
LM960 Band Selection?
Posted: Tue Sep 07, 2021 12:46 am
by iceburglar
For setting bands, the
LM960 AT Commands Reference Guide r1 gives a chart of the "bit mask" ( am I using that term correctly? ) values for each band as follows;
Code: Select all
<LTE band>
1 B1
2 B2
4 B3
8 B4
10 B5
40 B7
80 B8
800 B12
1000 B13
2000 B14
10000 B17
20000 B18
40000 B19
80000 B20
1000000 B25
2000000 B26
8000000 B28
10000000 B29
20000000 B30
80000000 B32
2000000000 B38
4000000000 B39
8000000000 B40
10000000000 B41
20000000000 B42
40000000000 B43
200000000000 B46
800000000000 B48
The module also supports band 66 and 71 which have no corresponding value, the manual goes on to say;
Is this to mean that the only way to disable/enable band 66 and 71 ( T-Mobile )on the LM960 is by switching between Firmware images? That doesn't seem very intuitive
Re: LM960 Band Selection?
Posted: Tue Sep 07, 2021 11:21 am
by zac2424
I've been wondering the same. Mine tends to lock on B66 most of the time on Verizon, but will sometimes want to revert to B13 or B4 with much slower speeds. Wondering if there is a way to set CA to user B66 and B2 for example like I could with my 7565.
Re: LM960 Band Selection?
Posted: Tue Sep 07, 2021 4:30 pm
by iceburglar
In my original post I was referencing Revision 1 of the
LM960 AT Commands Reference Guide dated 2018-04-19 . Looks like they are currently on Revision 7, released 2021-04-13 . The note that I circled in red from Revision 1 does not appear in Revision 7, and they now document the use of the
<LTE band ext> parameter for use with the
#BND command.
Code: Select all
AT#BND=
<GSM band>
[,<UMTS band>
[,<LTE
band>[,<LTE
band ext>]]]
...
<LTE band>:
0 disable
1 B1
2 B2
4 B3
8 B4
10 B5
40 B7
80 B8
800 B12
1000 B13
2000 B14
10000 B17
20000 B18
40000 B19
80000 B20
1000000 B25
2000000 B26
8000000 B28
10000000 B29
20000000 B30
80000000 B32
2000000000 B38
4000000000 B39
8000000000 B40
10000000000 B41
20000000000 B42
40000000000 B43
200000000000 B46
800000000000 B48
<LTE band ext>:
0 disable
2 B66
40 B71
Now I wonder if I need to update my firmware to be able to use the
<LTE band ext> parameter. Because when I issue
AT#BND? , the terminal returns
Which does NOT appear to contain data for
<LTE band ext>
Re: LM960 Band Selection?
Posted: Tue Sep 07, 2021 5:12 pm
by iceburglar
zac2424 wrote: ↑Tue Sep 07, 2021 11:21 am
I've been wondering the same. Mine tends to lock on B66 most of the time on Verizon, but will sometimes want to revert to B13 or B4 with much slower speeds. Wondering if there is a way to set CA to user B66 and B2 for example like I could with my 7565.
What router or device is your LM960 installed in? I think you would be able to set it to do that. I'm using the generic firmware with T-Mobile and so far I have left all the band/CA settings default, and while running speedtests I've seen goldenorb/rooter report that I'm on B66 ( 20 MHz) with CA on B2 ( 20 MHz ).
You could try
AT#LCFC to see what CA combinations are supported on your module;
Re: LM960 Band Selection?
Posted: Tue Sep 07, 2021 9:56 pm
by Didneywhorl
From what I have seen, this is correct. Certain firmware images on the Telit does not allow you to lock out B66 and B71.
Re: LM960 Band Selection?
Posted: Wed Sep 08, 2021 8:56 am
by zac2424
Under Modem > Network Status I can see it use CA, usually B66 20mhz, B2 10mhz, B66 5mhz. But under Modem > Misc I don't have a UI option to bandlock (says bandlock not implemented for this modem). I'm on firmware version 2021-02-20 on a WG3526. Not sure if newer versions have this for a LM960 or not.
I tried that AT Command and it just returned the command as a response. I've been able to find supported bands for the LM960 but nothing around setting the CA settings like my old 7565 would via the Excel spreadsheet.