title: TS-7500 doesn't detect ttyACM ports
body: <p>I have a TS-7500 board which runs 2.6.36 kernel and a Arudino Uno. When I connect the arduino to TS-7500, it doesn't show up a ACM device.</p>
  
  <p>After running <code>$ modprobe cdc_acm</code>, dmesg shows the  following output</p>
  
  <pre><code>usbcore: registered new interface driver cdc_acm
  cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters
  </code></pre>
  
  <p>But why TS-7500 doesn't assign any port no (for eg. <strong>ttyACM0</strong>) to Uno in /dev. Ideally it should show a msg like </p>
  
  <pre><code>cdc_acm 1-2:1.0: ttyACM0: USB ACM device
  </code></pre>
  
  <p>Someone please clarify the issue. Thanks in advance.</p>