I want to install my ZTE ZXDSL 852 ADSL modem. I read several post on the forum but non of them worked for me. When I used lsusb command it detect the modem as

Bus 002 Device 004: ID 0483:0138 SGS Thomson Microelectronics

But when I used "wvdialconf", it does not detect the modem. This is the output

root@home:~# 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.
ttyS1<*1>: ATQ0 V1 E1 failed with 2400 baud, next try: 9600 baud
ttyS1<*1>: ATQ0 V1 E1 failed with 9600 baud, next try: 115200 baud
ttyS1<*1>: ATQ0 V1 E1 and failed too at 115200, giving up.
Modem Port Scan<*1>: S2 S3

Sorry, no modem was detected! Is it in use by another program?
Did you configure it properly with setserial?

And I tried usb_modeswitch also, but my modem (ZTE ZXDSL 852) was not in the usb_modeswitch.conf file.
Please help me to install my modem!

ISP: SLTNET
VPI: 8
VCI: 35
Protocol PPPOE
Authentication: PAP