Modem is the abbreviation for "Modulator/Demodulator", a device to translate digital signals for transport over analog lines, typically but not only phone lines.

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Unable to connect INTEX 3.5G (aka 普创E003) Wireless USB modem in Ubuntu 12.04 LTS

Can anyone help me out on connecting INTEX 3.5G 7.2 Mbps (aka 普创E003) Wireless USB modem in Ubuntu? Initially it is recognized as a storage device and the modprobe cmd does not create any impact on ...
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Troubles establishing connection with wvdial

I have a Huawei cell modem EM680 with which I can establish a connection on my Ubuntu 13.10 box just fine. I plug it in and I can establish a connection using the Connections Manager. I have a box ...
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How to do iptables nat loopback?

I have a linux server behind the ISP's cablemodem-router combo. With some hacking I was able to make the port forwarding work, and the DHCP exceptions in the udhcpd. But I wasn't able to do the NAT ...
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3answers
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D-Link DWM-156 HSPA USB Modem doesn't work with SIM card inserted

I have a D-Link DWM-156 HSPA modem, that I bought just a few days ago. The modem has drivers in its internal storage. There are Debian packages (.deb) for both i386 and amd64, so obviously I installed ...
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1answer
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Problem using GSM USB modems on HP Pavilion laptop

A week ago I migrated from an old PC running Ubuntu 11.04 to Laptop running Kubuntu 16.04. I am having problems using USB modems on the new setup. 1st modem is a ZTE. This modem intermitently loads. ...
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Huawei E3372s + Linux (Rasbian), Incoming connections problem

I have a Linux-based OS (Rasbian) running on Raspberry Pi 2+ and it is using Huawei E3372s 4G/LTE USB Stick for internet connection. All my outbound connections work perfectly (Huawei USB mode ...
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1answer
793 views

Qualcomm based modem Venus converted to ttyUSB0 but not responding forever on fedora 18

I've one usb modem qualcomm based, here is my configuration what I've done in the past. wvdial # wvdial phone --> WvDial: Internet dialer version 1.61 --> Cannot get information for serial ...
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3answers
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Endless data loop from dev/ttyUSB while sending AT commands

I have problem sending AT commands to my USB modem. At first I tried php-serial class, but when i was reading data, I got endless loop with strange data. Then I tried to debug problem and opened putty ...
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1answer
1k views

Changing mode preference (1x/EVDO/Hybrid) for USB modem

Device in question - Huawei HC156 (what it says on the packaging)/HC1260 (what it says in lsusb). I CAN connect to the internet with it, but I can't change modes between 1x, EVDO, Hybrid. The option ...
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473 views

“Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:14.0/usb2': not supported by any plugin”

I just bought a new laptop: "HP EliteBook 840 G2". I used this computer during my travel in a train. I buy this laptop because, It have a 4G modem integrated. This module work on Windows but I can't ...
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19 views

GSM modem and USB serial port issue with UDEV

I have 2 devices Dlink DWM-157 3g modem and Trendnet TU-S9 usb to serial. The Dlink modem came with a udev script which works fine when the usb-to-serial is not plugged in from boot. So if the ...
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Why the connection speed is limited to 20-30 mbit/s in the case of a PPP daemon?

I'm configuring my LTE modem (Huawei E3372s-153, NON-HiLink), and I recently found out that this modem can work in two different modes: RAS and NDIS (NCM). The second one works just as normal NIC and ...
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34 views

Is there a way to tell wvdial to wait for the answer of a command?

Some AT commands in wvdial return their answers with a delay. This period of time depends on the command. For instance, when you want to scan for available networks, you can use the AT+COPS=? command. ...
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how to configure mgetty to answer and dial 6 on ring?

We have an intercom system running on the normal phone line and I would like to put together a very simple little machine which can a) authorize me via HTTPS b) after authorization for the next few ...
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2answers
1k views

configure gsm connection using nmcli

I have a system without X display and I want to use nmcli to configure my cell modem to connect to a certain apn. I can get it going with this modem just fine on Ubuntu (with X) and I would like to ...
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1answer
48 views

airmon-ng wlan0 help

I'm extremely new to all this so apologies in advance. I've been told to try and hack into my modem and I was linked to here. I'm up to step four where I airmon-ng start wlan0 but instead of saying ...
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89 views

Dial up HSF usb Conexant modem linux driver for ARM architecture

Hello I've being trying to install my usb HSF Conexant dial up modem to my Raspberry PI 2 B which is running Raspbian OS. I checked a company named Linuxant that makes these kind of drivers but ...
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70 views

Setup Huawei 3G modem under NetBSD

NetBSD 7 see my modem as u3g with ucom's. How I can setup it to work? Is NDIS available or only RAS?
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33 views

3G modem side step

I've been tinkering with a Huawei 169 3G modem on Raspbian (Debian) with wvdial, gradually improving its penchant for disconnecting. When it does disconnect ppp tries to reconnect but can't because ...
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2answers
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USB 3G/4G modem problem

I have LTE USB modem identified as ID 0408:ea16 Quanta. It doesn't have problem with my windows machine, but with my fedora (kernel 3.18.5-201) it is not working. I've found some info in the ...
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1answer
44 views

Using shared serial modem

I'm trying to use on Solaris box modem connected to Linux box via serial port. Sharing is made from socat. Server command(linux): socat tcp-l:54321,reuseaddr,fork ...
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1answer
361 views

How can I know which serial port corresponds to a PCI card?

I have a vehicle computer with a internal 3G PCIe card for cellular communications, but I can't figure out which serial port I have to use in order to send AT commands. This computer also includes a ...
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732 views

Could not resolve host: mirrorlist.centos.org

I did a fresh install of CentOS 7 on an Acer Inspire T. It is a terminal-only installation (no GUI). I connected the CentOS 7 box to a cable modem via an ethernet cable, and the cable modem is ...
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111 views

socat for sharing serial port from linux to solaris

I'm trying to share serial port from linux box to solaris 10 box (solaris machine don't have serial port). While doing the same commands from linux box (modem-server) to other linux box - everything ...
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108 views

FriendlyArm pppd problem

I have two files in FriendlyArm. 1-) wcdma is an option file to use with "pppd file" nodetach debug lock /dev/ttySAC2 115200 user "" password "" nocrtscts show-password usepeerdns noipdefault novj ...
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1answer
33 views

Sending command to an already mounted modem

I'm working on a IMX6 based board, and I need some advice to handle my modem. I've successfully configure the modem, and mounted the ppp. The modem is working fine and everything's great, but now I ...
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1answer
338 views

IP address assigned when using 3G USB modem

If I use a 3G USB modem with a SIM card on my linux machine, do I get the IP address assigned by the carrier just as my phone when it uses the same SIM card, or do I get a different IP address (as it ...
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1answer
86 views

Making a 64 modem pool work on Ubuntu

I have a 64 port siemens wavecom modem pool connected via USB to a Computer running Ubuntu. I am trying to create a python script that interacts with the modems for some automated testing project but ...
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88 views

Trying to get a usb modem to run with wvdial

$ sudo 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>: ...
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1answer
81 views

pcap file 20 times smaller than ifconfig TX/RX difference for same period

I run tcpdump on a usb modem in network card mode. [ 18.260000] cdc_ncm 1-1.1:1.1 wwan0: register 'cdc_ncm' at usb-ehci-platform-1.1, Mobile Broadband Network Device, 0c:5b:8f:27:9a:64 I run it ...
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Making voice calls using Huawei E1550

3G dongle Huawei E1550 is able to make voice calls using huawei app in windows. With search I found the same app for linux (called Mobile Partner), seems it's working and makes calls but without sound ...
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USB 56k modem not detected

I have this USB 56k modem which I'm using to write some home automation software that will let me know when my home phone is ringing. My software works on my Ubuntu 14.04 LTS laptop, with my modem ...
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1answer
386 views

4G modem on an embedded 2.6.32.9 kernel on a Parrot AR Drone 2.0

I am attempting to compile support for a Huawei E3276 usb LTE modem for an embedded Linux/BusyBox installation on a Parrot AR Drone 2.0, which is based on kernel 2.6.32; however, I am running into ...
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How to communicate with modem over Ethernet?

I have an old modem I was considering repurposing. The first step I thought to do was connect my computer with the modem and try to map the open ports. I found that, upon connecting the device, that ...
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1answer
558 views

How to send AT commands to modem once the connection is established?

I have a zte 3g modem. I use carrier provided dialer for connection establishment. Once the ppp connection is active, i would like to send some AT commands(for ex. Query signal strength, AT+CSQ). But ...
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3answers
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How to send AT commands to a modem in Linux?

In Linux (Ubuntu) I am trying to send AT commands to a modem at /dev/ttyACM0. I tried to do it as: sudo socat - /dev/ttyACM0 but when typing anything I just get a line repeating this command (I ...
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1answer
252 views

List serial devices on FreeBSD

On FreeBSD, I'm looking for a way to list serial communication devices. The computer has two of them installed: An on-board serial console (ttyS0), and an internal analog modem. I can find out about ...
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228 views

How do I ask NetworkManager/ModemManager to run a program before pppd?

The story is not so important for this question, but here it is: the GPRS modem is locked-in to the vendor's software (it doesn't work, if it doesn't receive a correct response to a "challenge" it ...
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1answer
1k views

What is the complementary command to 'rx' for xmodem transfer?

I have an installation of busybox on an embedded linux system that comes with a great little utility called rx: rx FILE Receive a file using the xmodem protocol This is perfect for transferring ...
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1answer
200 views

My Mobile Internet connection is disabled even though it is enabled

I don't know how to better formulate the question. I have enabled the Mobile Broadband, and the system correctly detects that I have a Vodafone CZ HSUPA connection available on the SIM card. However, ...
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448 views

How to connect ZTE MF 823 Surf Stick in virtual Linux?

I have an LTE Surf Stick which I would like to get working inside my virtual machine. The Stick is called "ZTE MF 823". I am running openSUSE 13.1 with NetworkManager and I was not able to find any ...
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3answers
3k views

Modem is not being detected (Why I've to usb_modeswitch?)

I am using Trisquel 7.0 LTS and mobile broadband (Net-Setter) to establish connection. Following states (1-4) are showing different conditions/situations for clear understanding of problem. ...
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How to enable second SIM slot in ALIX6F2 and how to switch 3G to it from the 1st one?

I am trying to enable the SIM slot under the RF card but with no success whatsoever. I'm using Voyage 0.8 (a stripped off Debian distribution) as an operating system. A bit of searching landed me to ...
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272 views

mgetty stopped working as dialin after opensuse upgrade

Background: OpenSuSE 11.4 worked well for a couple of years. mgetty was configured to listen to /dev/ttyS0 and work as dialin link. Updated system to OpenSuSE 12.1 > 12.2. > 12.3 > 13.1 and lost ...
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Switching from GSM to CDMA

NetworkManager has crashed and now it's showing CDMA mobile broadband as a GSM device. How I can switch to CDMA mode? I'm using Ubuntu.
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421 views

Gobi 2000 not detected on Lenovo X201

I recently bought a used Lenovo X201 wich includes a Gobi 2000 3G modem, but I can't get it working for the simple reason: the USB device does not appear to show up in the kernel. uname -r output: ...
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2answers
2k views

How to set WiFi password on modem - buffalo airstation g54

I borrowed a WiFi modem from a friend - Buffalo Airstation G54 . I don't know about installations procedure, I just would like set a password to use the wifi, since now it is a free connection. I ...
2
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1answer
946 views

Cannot connect with 3g modem during Arch installation [closed]

I was trying to install Arch Linux with 3g modem. I had previously downloaded usb_modswitch and wvdial and their dependencies. I booted Arch and installed them. Then I copied my Ubuntu's ...
3
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1answer
149 views

Simple telephone system to record kids' “calls”

My four year old daughter loves playing with an old POTS phone. She has these amazing conversations on it and I thought it would be nice to record them, and perhaps even let her pretend to make ...
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1answer
171 views

Serial port's modem lights up, but can't communicate

My MB has builtin UARTs (Supermicro X10SAE). I've got an external modem hooked up to /dev/ttyS0. I'm running CentOS7. Without minicom running on /dev/ttyS0: The modem has CTS on. With minicom ...