Operating system name and version: Debian 6.0.4
Version of smsd: 3.1.14
Smsd installed from: sources
Name and model of a modem / phone: USB Modem Teltonika G10

Today, my modem can't send sms. This is the log
2013-01-12 09:27:36,7, Teltonika: -> ATE0+CMEE=1;+CREG=2 2013-01-12 09:27:36,7, Teltonika: Command is sent, waiting for the answer 2013-01-12 09:27:37,7, Teltonika: <- ATE0+CMEE=1;+CREG=2 ERROR 2013-01-12 09:27:37,3, Teltonika: Modem did not accept the pre-init string 2013-01-12 09:27:37,6, Teltonika: Checking if modem needs PIN 2013-01-12 09:27:37,7, Teltonika: -> AT+CPIN? 2013-01-12 09:27:37,7, Teltonika: Command is sent, waiting for the answer 2013-01-12 09:27:37,7, Teltonika: <- AT+CPIN? ERROR 2013-01-12 09:27:37,2, Teltonika: PIN handling: expected READY, modem answered AT+CPIN? ERROR 2013-01-12 09:27:37,2, Teltonika: Modem handler 0 terminated abnormally. PID: 1989.

I have restart the sms daemon and restart the pc.
So, please help me.
Thanks

...and restarting helps?

If this is the case, you have a problem with serial communication, and I cannot help with that . If USB is unstable, change the hardware.

no, it didn't help
ok. thank you.
i'll find another modem.