Operating system name and version: Ubuntu Linux Server 12.04LTS
Version of smsd: 3.1.15
Smsd installed from: sources
Name and model of a modem / phone: 16-port pool connected via USB(wavecom gsm modem multiband 900e 1800)
Interface: USB


we recently got hold of a 16-port modem pool with a USB interface,

when connected to a linux server, 16 devices where detected:
/dev/ttyACM0 to /dev/ttyACM15

When running sms3, we get the following error on all modems:
GSM0: -> AT
GSM0: Command is sent, waiting for the answer
GSM0: put_command expected (OK)|(ERROR), timeout occurred. 1.
GSM0: <-



smsd.conf:

devices = GSM0, GSM1, GSM2, GSM3, GSM4, GSM5, GSM6, GSM7, GSM8, GSM9, GSM10, GSM11, GSM12, GSM13, GSM14, GSM15
loglevel = 7
outgoing = /var/spool/sms/outgoing
checked = /var/spool/sms/checked
failed = /var/spool/sms/failed
incoming = /var/spool/sms/incoming
sent = /var/spool/sms/sent

[GSM0]
device = /dev/ttyACM0
incoming = yes
baudrate = 9600

...

[GSM15]
device = /dev/ttyACM15
incoming = yes
baudrate = 9600

Modems tested working on WindowsXP SP3 with a proprietary desktop tool.
checked driver settings: 9600baud 8N1

How do I begin to get this to work on Ubuntu Linux Server?

please see , may be this is your case : http://smstools3.kekekasvi.com/topic.php?id=516 ?