Dial In Server on Scientific Linux 6.3 or CentOS 6.3

Dial In Server on Scientific Linux 6.3 or CentOS 6.3

################## Step 01 ############################

[root@localhost ~]# rpm -q wvdial
package wvdial is not installed
[root@localhost ~]# yum install wvdial -y
Loaded plugins: refresh-packagekit, security
Setting up Install Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
--> Running transaction check
---> Package wvdial.x86_64 0:1.60-12.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

===============================================================================================
 Package              Arch                 Version                    Repository          Size
===============================================================================================
Installing:
 wvdial               x86_64               1.60-12.el6                base                91 k

Transaction Summary
===============================================================================================
Install       1 Package(s)

Total download size: 91 k
Installed size: 218 k
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : wvdial-1.60-12.el6.x86_64                                                   1/1
  Verifying  : wvdial-1.60-12.el6.x86_64                                                   1/1

Installed:
  wvdial.x86_64 0:1.60-12.el6                                                                 

Complete!
[root@localhost ~]# rpm -q wvdial
wvdial-1.60-12.el6.x86_64

################## Step 02 ############################

[root@localhost ~]# wvdialconf
Editing `/etc/wvdial.conf'.

Scanning your serial ports for a modem.

ttyS0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud
ttyS0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud
ttyS0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up.
Modem Port Scan<*1>: S1   S2   S3  
WvModem<*1>: Cannot get information for serial port.
ttyACM0<*1>: ATQ0 V1 E1 -- OK
ttyACM0<*1>: ATQ0 V1 E1 Z -- OK

details here