Questions tagged [modem]

This tag is for questions about a network interface for analog lines such as “56k” or DSL on phone lines, as well as for mobile network data service clients.

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25 views

wvdial and ppp disconnects

I try to setup an Internet connection on an OrangePi IoT 2G board with build-in modem. The at-commands are working fine, even connect and start pppd, but one second later it disconnects and therefore ...
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1answer
23 views

Dial-up vintage BBS access with agetty and a modem

I'm trying to setup a 80's service with Mystic BBS (that runs on telnet), including a dial-up access with a U.S. Robotics modem connected to the serial port of the server. I succeeded with mgetty: /...
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41 views

Linux ppp0 and default route and how to reach public internet

my project needs mobile internet. I am trying to achieve this by using a LTE stick modem with a M2M sim (public IP, no NAT) This works well on ubuntu (5.3.0-29-generic), but I cannot get it working ...
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28 views

Modem not reconnectiong after 4G disconnect

In one of our systems we recently had the problem that after a disconnect from the 4G network the modem did not reestablish the connection, even thought the 4G connection was back up again. A manual ...
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0answers
15 views

USB GSM modems become unresponsive when many are accessed at the same time

I'm working at a project that requires concurrent access to multiple USB serial devices (modems) through the Linux option driver. The USB modems are connected through an USB 3.0 hub. As I connect ...
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37 views

Can't make Huawei modem function despite all efforts

I have started using linux recently as part of my programming course, but have had to revert to using my slower ethernet connection in order to get anything done. My usb Huawei modem (E5785), which ...
4
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2answers
1k views

Difference between PPP, QMI and AT commands

During the past 6 days, I had the chance to interact with an LTE modem (https://sixfab.com/product/quectel-ec25-mini-pcle-4glte-module/), I managed to set up 4G Internet access on a Raspberry Pi using ...
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1answer
74 views

Why does plugging in a cellular modem create 8 different device files?

I am using a BeagleBone board running Debian. When I plug in a USB cellular modem, this creates the following files in the /dev folder: ttyACM0, ttyACM1, ttyACM2, ttyACM3, ttyModem0, ttyModem1, ...
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1answer
126 views

Determine which device was assigned to a USB modem?

I'm testing a Tinker board, which is an ARM gadget running Debian 9.8. I inserted a USB modem. It appears the modem was detected but I can't find a device for it: [ 8178.815663] usb 1-1.1.5: new full-...
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0answers
167 views

Network-/ModemManager doesn't unlock SIM automatically

I use nmcli to set up a gsm connection in Ubuntu 16.04. Configuring this connection I set the gsm.pin property and auto-reconnect is enabled. When nmcli tries to connect it says that the modem is in ...
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1answer
132 views

SSH over incoming call from faxmodem possible?

I have a flaky broadband internet connection, and, seperated from that, a classic analog landline. Furthermore, I have a raspberry pi and a usb 56k-faxmodem. When I am not at home and can't reach my ...
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228 views

USSD in ZTE MF833T

The modem is directly running as USB Etherne and is not detected by Modem Manager GUI. I have to manage settings in address http://192.168.0.1/. Is it possible to send USSD request in ZTE MF833T ...
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4answers
486 views

Is there a way for linux to display caller id?

After switching to linux, one thing i miss is something called phonetray, which displayed caller ID to my screen. I wondered if there is a way for Linux to do something similar. I found a blog ...
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0answers
311 views

How to script AT command to modem?

Every time my USB modem (/dev/dlinkModem) gets unplugged it defaults to "radio disabled mode" (AT+CFUN:4). I can easily enough call AT+CFUN:1 through the minicom application console to enable radio ...
2
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1answer
316 views

Convert sound encoded in RTTY 45.45 baud using minimodem

I've downloaded a file encoded in RTTY 45.45 baud (mp3 output of linked video). I'm not sure if the final output should be audio or text. I've also installed minimodem which I'm reading can convert ...
0
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1answer
32 views

Redirecting stdout makes modem unable to connect

I'm running Yocto with busybox on an embedded system with a Telit modem. If I launch the main program, script A, with ./script_A & there's no problem at all and the modem connects on the first ...
1
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1answer
72 views

How Do I Find The Mobile Provider From 4G Dongle?

I have two or more 4G dongles connected via USB. I have set up multiple configuration files (one for each provider), but short of a visual inspection (which for this project won't be possible in the ...
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2answers
192 views

SSH connection problem (timeout) from outside to ppp0 interface (4G modem) on Raspberry Pi [closed]

I am having difficulty establishing SSH connection from outside to Raspberry Pi that has USB 4G modem as interface. I get timeout when trying to connect with ssh: ssh -l pi ccc.ccc.ccc.ccc -p 22 ...
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0answers
56 views

huawei e800 expresscard modem not being recognized by manjaro

I'm trying to get a Huawei e800 expresscard / PCMCIA card modem to work in manjaro linux, but modemmanager is not detecting it at all, let alone let me configure a connection with it. The status light ...
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1answer
310 views

Unable to access modem IP through Linksys EA2700 router

Router IP: 192.168.1.1 (Linksys EA2700) Modem IP: 192.168.100.1 (Technicolor TC4350) Everything here refers to a wired configuration. Entering the modem IP in a browser address bar returns an ...
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0answers
44 views

Why “receive / transmit bytes” is so big difference between optical modem and host when download data on host?

ens33 is my host network card,it show a normal number as my network use status,but I don't know why my modem show a very small data traffic in all interfaces of modem when download on host. My host: ...
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0answers
60 views

Set Sierra modem to packet switching via AT Command using ubuntu live CD

Lifebook E5440 has WWAN Modem Sierra EM8805 Multi SIM - Phone is occupied when Notebook is online i know this problem from lenovo notebooks Win10 doesnt let me set the config cause there is no com ...
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2answers
286 views

Debian Stretch / Gnome Network Manager: select network interface for sftp

So I have a computer running Debian Stretch; it needs to network to a Raspberry Pi on eth0 using a static IP (e.g. 192.168.0.x), while being able to grab files via sftp using a mobile broadband modem (...
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0answers
74 views

Open WRT mini router: mobile modem installation

The GL-AR300M mini router runs a Linux based Open WRT system, making it highly configurable. Recently i have been trying to use the 3G modem Option Globetrotter GI0505 i have with it, but without ...
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0answers
276 views

WvDial serial communication not working with uart /dev/ttySAC4, but works with `screen`

I have embedded system based on Samsung Artik 710 board connected to Fibocom G510 cellular modem module via UART (two lines - RX and TX). When I try to communicate with modem using screen - modem ...
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0answers
510 views

ppp internet not only after restart

I have configured my network to get internet from HUAWEI E3131 usb modem at start. So I have prepared special wvdial.conf and interfaces files: wvdial.conf: root@debian:/home/s# cat /etc/wvdial.conf ...
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0answers
270 views

LEDE cannot create modem interface

System: Onion Omega2s LEDE 17.01 I have connected a Huawei ME90E modem to the USB port of the Omega2s. I have successfully connected the ME906E modem to the Raspberry Pi running Debian, but have ...
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0answers
161 views

How do I connect to the internet with 3g usb modem (mobile broadband connection) in OpenBSD?

In order to install the GUI in OpenBSD! I know how to connect to wifi but now I have only 3g-usb-modem Huawei E171 and I don`t know how to connect to the internet via 3g-usb-modem in OpenBSD ! How can ...
2
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1answer
506 views

How do I make ppp reliable over lossy radio modems using pppd and tcp kernel settings on debian?

I am having a lot of trouble establishing a reliable ppp / tcpip link between two debian systems over radio modems. My hardware topology is a little complex. The system uses: Raspberry Pi 3B at ...
4
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1answer
2k views

How to get audio in and out of Huawei GSM modems when doing a voice call?

I have a Huawei E160E and a Huawei K3765 "GSM"-modem. The question is: How to send and receive audio data placing or receiving phone/ voice calls with those modems? Both seem to support voice calls, ...
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1answer
92 views

Data and control channels for a modem in Linux?

I have a USB modem detected as a device device file (/dev/ttyACM0). Redirecting AT commands to the device file seems to work as the modem responds. Am going with the following assumption, the upper ...
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0answers
464 views

udev high cpu problem

i just reinstalled KUbuntu 16.04.4 64bits on my toshiba. Here https://pastebin.com/qKVpp0re is the result of the udevadm monitor command. KERNEL[8960.854968] change /devices/pci0000:00/0000:00:...
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2answers
3k views

cellular modem: pppd modem hangup

I am trying to establish a cellular connection to Verizon through my Multitech Multiconnect Dragonfly (MTQ-LVW3-B02). I am able to connect to Verizons network and get an IP address. The problem is ...
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0answers
161 views

mgetty dial-up console: 'who' not displaying modem connection information

I have a dialup console on a Linux box (Raspbian 9.1 on a Raspberry Pi 2 model B Rev 1.1, if it matters). mgetty version is 1.1.36-3. I can dial in and everything functions fine. In the past, on my ...
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1answer
872 views

How to setup 3G modem in OpenWRT?

OpenWrt Chaos Calmer 15.05.1. USB dongle ZTE MF190. I executed some installation commands from this tutorial. Now dmesg | grep usb shows me the following: [ 4.150000] usbcore: registered new ...
2
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0answers
811 views

No IP for USB 3G modem Huawei E3131 using modemmanager

I am trying to use a Huawei E3131 USB 3G modem on a Raspberry Pi system using raspbian (Debian 8) and modemmanager. I have two of those modems, and while they look the same, to the system they seem ...
2
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1answer
781 views

How to establish an IP conncetion with ModemManager, but without NetworkManager?

To test connectivity without NetworkManager, we would like to establish an IP connection using only ModemManager and basic Linux tools except NetworkManager, e.g. pppd. Our modem is a Telit HE-910 (3G)...
2
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1answer
525 views

How to get Kc key and TMSI number with AT command in Linux

I've completely configured the port with opened modem on ttyACM0 as my mobile device (HTC M8). However, it didn't allow me to enter anything. I've tried with hotkey Ctrl-A Z, but there was no news. I ...
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0answers
145 views

How can I set expected data format using qmicli in Debian jessie?

OS: Debian GNU/Linux 8 (jessie) Hardware: CHIP Pro libqmi-utils 1.10.2-2 installed by apt-get from jessie/main does not have the --set-expected-data-format option. I am using the EM7430 modem ...
2
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1answer
821 views

qmicli Cannot set expected data format [closed]

OS: Raspbian GNU/Linux 9 (stretch) Kernel: Linux 4.9.41-v7+ I am using a EM7430 embedded modem. This modem supports raw-ip only. Run ip addr shows 3: wwan0: <BROADCAST,MULTICAST,UP,LOWER_UP&...
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3answers
1k views

DHCP client fails to get IP address (Modem EM7430)

O/S: Raspberry Pi running Raspbian GNU/Linux 8 (jessie) Kernel: Linux 4.9.24-v7+ Ran ip addr and confirmed wwan0 and wwan1 interfaces are created. wwan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu ...
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4answers
667 views

cannot access USB device from a program started with systemd

I have the following script to send SMS messages with a GSM usb modem: #!/bin/bash env > /home/hans/systemenv.txt #touch /home/homeassistant/pipo2.txt read count < /home/homeassistant/....
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0answers
62 views

Creating a gdbus object (sim card)

I have a wwan modem in which I can insert a sim card, via gdbus introspect I am a ble to retrieve every information I would need to simulate that sim card (Identifier, imsi, operator identifier and ...
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0answers
154 views

The problem with installing drivers for the TP-Link modem TL-WN722N Kali1 and Kali2 [duplicate]

I'm new to Kali. Kali1 installed on a virtual machine, but Kali2 installed on HDD. Errors are the same. modem TL-WN722N v2 The driver was downloading from here GitHub /lwfinger/rtl8188eu.git. As per ...
2
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0answers
41 views

CDC device filename locked after modem power down

I have Linux machine (ARM based, built using Yocto, kernel 4.10) with modem connected using USB interface. Modem can be powered up or down using GPIO lines. After powering modem, CDC device file is ...
2
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0answers
6k views

Huawei E3372h usb_modeswitch

I'd like to switch my Huawei E3372h-153 from HiLink/router-mode to Stick/modem-mode. I use a Raspberry Pi (Raspbian) and the usb_modeswitch tool. My command to switch the device: usb_modeswitch -V ...
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0answers
1k views

No DHCPOFFERS received

Modem: Huawei ME906s-158, Computer: Raspberry Pi I am getting this error message No DHCPOFFERS received Am I missing a step? Running usb-devices shows: T: Bus=01 Lev=02 Prnt=02 Port=04 Cnt=04 ...
1
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1answer
559 views

3g Modem not auto connecting with console mode but auto connects while in desktop!

I have strange behaviour. I have USB 3G Modem and it doesnt auto-connect, yet that's what I want. I am just in headless mode; I'm trying "nmcli" and it doesn't work at all. But when I start desktop ...
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1answer
1k views

?z waiting to receive.**B0100000023be50 when I use rz to upload file

I'm connected from my Mac to a remote Linux machine. I'm following the steps of a tutorial, and after installing the lrzsz package it told me to run the rz command. In the tutorial it opened a window ...
2
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0answers
890 views

D-Link DWM-157 3G USB Modem doesn't connect

I want to connect to the internet using D-Link DWM-157 3G USB Modem, with Raspberry Pi 3 and Raspbian Jessie as OS (latest version). I've tried billions of methods without success!! This is so far ...