Version of smsd: 3.1.14
Smsd installed from: sources
Name and model of a modem / phone: WAVECOM Fastrack Xtend GPRS
This WAVECOM unit had all kinds of trouble when used with a USB link, so a serial cable has now been in use for a few weeks. However, the unit still hangs seemingly at random after prolonged use.
The log file always reports the same thing:
Command is sent, waiting for the answer
put_command expected (OK)|(ERROR), timeout occurred
At this point, restarting sms3 to reset the modem doesn't work. The unit remains completely mute until power cycled. The problem will repeat itself every 2 or 3 days.
Here's the config. send_handshake_select used to be "no" because it made the USB link a bit more stable. It doesn't seem to affect how often the device hangs when connected via serial.
'smsdconf' Syntax Highlight powered by GeSHi
Elsewhere on the site it was suggested that an unstable power supply can cause unexplained behaviour. However, this unit is powered through a heavy duty Fiskars UPS and the supplied power brick.