Sina, scanModem reports that your modem is potentially supported through slamr,ko + ungrab-winmodem.ko, i.e, slmodem package from linmodems website: Predictive diagnostics for card in bus 01:00.0: Modem chipset detected on NAME="Modem: ALi Corporation SmartLink SmartPCI563 56K Modem" CLASS=0703 PCIDEV=10b9:545a SUBSYS=2020:545a IRQ=17 HDA2=00:1b.0 IDENT=slamr For candidate modem in: 01:00.0 0703 Modem: ALi Corporation SmartLink SmartPCI563 56K Modem Primary device ID: 10b9:545a Support type needed or chipset: slamr Writing DOCs/Intel.txt There is a package sl-modem-source providing a source code the modem driver , If can be searched for at http://pacakge.ubuntu.com. After downloading install under Linux with: $ sudo dpkg -i sl*.deb It is preferable to install the dkms package first. With DKMS support installed, driver updates with kernel updates will be automatically done. The modem is supported by the Smartlink plus the slmodemd helper utility. Read the DOCs/Smartlink.txt and Modem/DOCs/YourSystem.txt for follow through guidance. For 2.6.32-220.el6.i686 compiling drivers is necessary. As of October 2007 the current packages at http://linmodems.technion.ac.il/packages/smartlink/ are the ungrab-winmodem-20070505.tar.gz and slmodem-2.9.11-20080126.tar.gz Writing DOCs/Smartlink.txt ================ Download: http://linmodems.technion.ac.il/packages/smartlink/slmodem-2.9.11-20110321.tar.gz and http://linmodems.technion.ac.il/packages/smartlink/ungrab-winmodem-20090716.tar.gz extract with $ tar -zxvf slmodem-2.9.11-20110321.tar.gz and $ tar -zxvf ungrab-winmodem-20090716.tar.gz then run $ cd slmodem-2.9.11-20110321/ $ make KERNEL_VER=/lib/modules/`uname -r`/build $ make $ su -c 'make install' passwd: then $ cd .. $ cd ungrab-winmodem $ su -c 'make' passwd: $ su -c 'make install' if compilation succeeded, then proceed to load module(s), ie., $ su - passwd: # modprobe ungrab-winmodem # modprobe slamr # slmodemd -c YOUR_COUNTRY /dev/slamr0 leave it running and then open a terminal tab or another terminal and type $ su - passwd: # wvdialconf /etc/wvdial.conf and hopefully it finds modem port /dev/ttySL0 and then proceed to edit the file /etc/wvdial.conf with root priviledges and add your username, password and a line "Carrier Check = no" to the file, save it and then run # wvdial Hopefully you can connect to internet. Regards, Antonio On Wed, May 9, 2012 at 6:45 AM, Sina Ahamadpour <sinaahmadpour1992@xxxxxxxxx> wrote: > Dear sir or madam > I'm a new one to CentOS and I have problem with my dial-up connection. > I really searched for any solution but non of them have been worked > for me. > Please help me what to do > Sincerely, Sina Ahmadpour