mbim, signal quality atds_signal_query vs. signal_state_query

[Ulrich Mohr]

Hey,

quite a while ago, I reported inconsistencies with Telit LE910Cx signal 
quality query when using mbim (see 
https://www.mail-archive.com/modemmanager-devel@lists.freedesktop.org/msg06990.html). 
Now I had to get back to this issue, since our customers heavily 
complain about the bad signal quality shown (although the connection is 
good and fast).

While trying to find a solution I stumbled across the atds_signal_query 
message and experimentally used it instead the signal_state_query mbim 
message. The result is, that the signal quality is now much higher and 
matches what we see when not using mbim (and matches what we see on the 
same location using other LTE modems).

So my questions are:

  * Is there any documentation about the atds_signal_query command? I
    did not find any.
  * Do I have to expect problems when I prefer using atds_signal_query
    over signal_state_query
  * How to submit that change to modemmanager so that it can be used by
    others?
    Should the command be used for this particular modem only, for all
    telit modems or even for all mbim modems? (In the patch I currently
    use, I use that command on all mbim modems that have the command
    available)

-- 
Best regards / Mit freundlichen Grüßen / Salutations distinguées

Ulrich Mohr

SEMEX-EngCon GmbH
Carl-Merz-Strass 26
76275 Ettlingen
Phone: +49 (0) 7243 5143596
email:u.mohr at semex-engcon.com
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