Finalmente tenho a solução, acho que isso deve ser compartilhar com a everuone, portanto, postando ....
Eu encontrei um comando: kdesudo wvdial enquanto procurava no Google. Abaixo está a saída do terminal.
mahesh@Mahesh-System-Kubuntu:~$ kdesudo wvdial
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT#777
--> Waiting for carrier.
ATDT#777
CONNECT
--> Carrier detected. Starting PPP immediately.
--> Starting pppd at Wed Feb 6 21:50:55 2013
--> Pid of pppd: 5481
--> Using interface ppp0
--> pppd: À[1b]@[08][18]@[08]
--> pppd: À[1b]@[08][18]@[08]
--> pppd: À[1b]@[08][18]@[08]
--> local IP address 115.241.164.245
--> pppd: À[1b]@[08][18]@[08]
--> remote IP address 220.224.141.129
--> pppd: À[1b]@[08][18]@[08]
--> primary DNS address 220.226.100.40
--> pppd: À[1b]@[08][18]@[08]
--> secondary DNS address 220.226.6.104
--> pppd: À[1b]@[08][18]@[08]
--> Connect time 0.0 minutes.
--> pppd: À[1b]@[08][18]@[08]
--> pppd: À[1b]@[08][18]@[08]
--> local IP address 115.241.164.245
--> pppd: À[1b]@[08][18]@[08]
--> remote IP address 220.224.141.129
--> pppd: À[1b]@[08][18]@[08]
--> primary DNS address 220.226.100.40
--> pppd: À[1b]@[08][18]@[08]
--> secondary DNS address 220.226.6.104
--> pppd: À[1b]@[08][18]@[08]
Obrigado a todos pelo seu apoio gentil!