<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>I have MM essentially running on my hardware, but I’m puzzled by a part of its behaviour:<o:p></o:p></p><p class=MsoNormal>I can enable the modem with mmcli --enable, and in the debug output I see the signal quality being periodically refreshed. I can also, more or less, make a connection to the APN with –connect, and then bring up ppp. <o:p></o:p></p><p class=MsoNormal>However:<o:p></o:p></p><p class=MsoNormal>Once the ‘--connect' has been done, MM can no longer get the signal quality – “signal_quality_check_ready(): Couldn't refresh signal quality: 'No AT port available to run command'”<o:p></o:p></p><p class=MsoNormal>A more serious problem is that if MM tries to fetch the signal quality after ‘--connect', but before ppp is started, then the ppp negotiation subsequently fails (“LCP: timeout sending Config-Requests”). I *can* get ppp connected as long as I start it before MM next tries to get signal quality.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In case it’s relevant, the modem is a Cinterion. I’m actually using it via their ‘linmux’ multiplexor – just on a single virtual port though.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m puzzled as to why MM keeps trying to get signal quality after the data connection – my understanding was that you can’t use [most] AT commands after this. I may be wrong there, but the info on my modem says (for ‘ATD*99#’) – “The V.250 'D' (Dial) command causes the MT to enter the V.250 online data state and, with the TE, to start the specified layer 2 protocol. No further commands may follow on the AT command line”<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Can anyone advise? Thanks<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>