Operating system name and version: CentOS 6.4
Version of smsd: 3.1.15
Smsd installed from: repository
Name and model of a modem / phone: Huawei E122
Interface: USB

I Have some problem with smsd.log, smsmtools works fine but i can see errors in log when smstools sending sms or for example restart service:

2013-08-24 11:56:15,5, smsd: Moved file /var/spool/sms/outgoing/send_tgCHjS to /var/spool/sms/checked 2013-08-24 11:56:15,3, Huawei: Unexpected input: ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 ^STIN: 0, 0, 0 2013-08-24 11:56:17,3, Huawei: Unexpected input: ^STIN: 0, 0, 0 2013-08-24 11:56:22,5, Huawei: SMS sent, Message_id: 4, To: 48XXXXXXXXX, sending time 7 sec.

Almost this same configuration works fine in another server (difference only hardware in server, except modem), operating and version system is the same.

If the same or similar modem works on another server without any unexpected input, see what ports are available (dmesg) on your current server. Try some other port than current, if it works for sending and receiving, and without those messages.

If the port makes no difference, try this init string:
init = AT^CURC=0

Problem solved, only need disable selinux (I forgot) then smsd.log is without errors.

Thx for help