title: gammu - No response in specified timeout. Probably phone not connected
body: <p>What do I do wrong?</p>
  
  <pre><code>$ gammu-detect
  ; Configuration file generated by gammu-detect.
  ; Please check The Gammu Manual for more information.
  
  [gammu]
  device = /dev/ttyACM0
  name = samsung GT-N7105
  connection = at
  &lt;...&gt;
  
  $ cat /etc/gammurc 
  [gammu]
  port = /dev/ttyACM0
  connection = at
  model = auto
  $ echo 'test' | gammu --sendsms TEXT 11111111111 -unicode -autolen 81 
  No response in specified timeout. Probably phone not connected.
  </code></pre>