Scenario Our Wavecom Fastrack 9000E GSM modem suddenly started giving an error and was refusing to send text messages. The device is attached to Centos 5.x VM which in turn uses a serial port on an ESXi 5.0 server. We use smsd to send  the text messages. # tail -f /var/log/smsd.log 2013-07-27 10:35:18,6, GSM1: Modem Read More…