how to connect a usb modem through the terminal

**ernes** · August 18th, 2012

Hello experts. I'v spent the past 2 days and 1½ hour from the third day trying to figure out how to configure my USB modem to start surfing on the net. And now i give up. Obviously i dont know what i'm doing so i need some help. I'm gettin an error when trying to connect with wvdial. Here is the error from the terminal:

Code:

--> Initializing modem. 
--> Sending: AT + CGDCONT=1, "IP", "bredband.tre.se" 
AT + CGDCONT=1, "IP", "bredband.tre.se" 
OK 
--> Modem initialized. 
--> Cannot get information for serial port. 
--> Initializing modem. 
--> Sending: AT + CGDCONT=1, "IP", "bredband.tre.se" 
AT + CGDCONT=1, "IP", "bredband.tre.se" 
OK 
--> Modem initialized. 
--> Sending: ATDT*99# 
--> Waiting for carrier. ATDT*99# ~[7f]}#@!}!}!} }9}#}%B#}%}(}"}'}"}"}&} } } } }%}&URy,kT~ 
CONNECT 
--> Carrier detected.  Waiting for prompt. 
~[7f]}#@!}!}"} }9}#}%B#}%}(}"}'}"}"}&} } } } }%}&URy,'9~ 
--> PPP negotiation detected. 
--> Starting pppd at Fri Aug 17 19:20:17 2012 
--> Pid of pppd: 10401 
--> Using interface ppp0 
--> pppd: ��B  
--> pppd: ��B  
--> pppd: ��B  
--> pppd: ��B 
--> pppd: ��B  
--> pppd: ��B  
--> pppd: ��B  
--> Disconnecting at Fri Aug 17 19:20:18 2012 
--> The PPP daemon has died: A modem hung up the phone (exit code = 16) --> man pppd explains pppd error codes in more detail. 
--> Try again and look into /var/log/messages and the wvdial and pppd man pages for more information. 
--> Auto Reconnect will be attempted in 40 seconds

And my wvdial.conf looks like this:

Code:

[Dialer Defaults]  
Init1 = AT + CGDCONT=1, "IP", "bredband.tre.se" 
Modem Type = USB Modem 
Phone = *99# 
ISDN = 0 
Username = * 
Password = * 
Modem = /dev/ttyACM0 
Baud = 460800 
Pin = 7702

This is the lsusb output:

Code:

Bus 001 Device 007: ID 12d1:1505 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard 
Bus 001 Device 004: ID 0bdb:1902 Ericsson Business Mobile Networks BV F3507g v2 Mobile Broadband Module

I've changed the wvdial.config several times with no success and if i change Init1 to:

Code:

Init1 = ATZ  
Init2 = AT + CGDCONT=1, "IP", "bredband.tre.se"

i get an error saying ATZ Error Bad init string. Here's the modem i'm using http://www.google.se/imgres?imgurl=h...Nb5gaAP&itbs=1 I really need some help here. Thanks in advance.

**dandnsmith** · August 18th, 2012

Can you give us some more info about your setup.
It looks to me as if you're attempting to use a serial-line dialup tool with a usb modem - but what sort of modem, and is there really a serial line connection, or is this a broadband linkup you're attempting? Is it to connect over a mobile-phone link?

**ernes** · August 18th, 2012

@dandsmith i'm using a Huawei E372 USB Modem Dongle, it's a mobile broadband modem. It has a sim-card in it and it requires a pin number of 4 digits to be able to connect. I tested it on Ubuntu 12.0.4 and it works fine but i'm having a really hard time trying to set it up on Backtrack 5 R3. Any help would be much appreciated.

**dandnsmith** · August 19th, 2012

I don't know anything about Backtrack.
I tried to follow the link in your edited posting - but it isn't a proper link, and goes nowhere.
Good luck in your hunt.

**ernes** · August 19th, 2012

Hi, you're right, the link was broken. It seem that the post was removed. See my edit, i added a picture of the USB dongle i'm using. Do i need to provide more information? Is my question not clear enough? Thanks.

**dandnsmith** · August 20th, 2012

I'm clear about what you're attempting, and the details of the device.

Unfortunately, you're outside my comfort zone and experience - I was attracted by the combination of terms 'terminal' and modem' in the post title, and wondered what exactly the situation was.

I suspect that there may be some country-oriented experience needed, given the ISP name - is there a forum closer to home for you to consult?

The whole technique of addressing the modem, and setting up the link using old-fashioned AT codes gets into an area where I could once have said what to do, but my experience is no longer relevant.

Sorry

I just found this thread which mentions the PIN. It could be that you'll find some bits of use, even tho' it's a different modem.