Hi, I attached a mobile phone (its name I-MATE SMART PHONE) to a box running CentOS 5 by using a usb cable which came with that phone. Now, it shows /dev/ttyUSB0 Now I want to send a sms to my friends. I installed gammu. Pls see below for installed rpm. [root at mailgw ~]# rpm -qa |grep gammu gammu-1.11.0-1.el5.rf here's my /etc/gammurc file. [gammu] port = /dev/ttyUSB0 ;model = 6110 connection = dlr3 ;synchronizetime = yes ;logfile = gammulog ;logformat = textall ;use_locking = yes ;gammuloc = locfile ;startinfo = yes ;gammucoding = utf8 ;rsslevel = teststable ;usephonedb = yes [gammu1] port = /dev/ttyUSB1 ;model = 6110 connection = dlr3 ;synchronizetime = yes ;logfile = gammulog ;logformat = textall ;use_locking = yes ;gammuloc = locfile ;startinfo = yes ;gammucoding = utf8 I tried to send an SMS to my phone. So I issued the below command. [root at mailgw ~]# echo hello | gammu --sendsms TEXT 0714857135 Error setting device DTR or RTS. Then, it gave the above error. How can solve this. or is there another better pkg for it? -- Thank you Indunil Jayasooriya -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070601/1775d214/attachment-0004.html>