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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Netgear39 Removal

I'm using Linux Mint 18.3 Cinnamon 32-bit. I had internet service going with a BrosTrend long range modem adapter, connecting to a Verizon Ellipsis Jetpack MHS900L. Things were going well, but now ...
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25 views

Modem Manager GUI USSD Not working

I am using Debian on my laptop. I installed Modem Manager GUI to use my modem which is a ZTE MF710M USB modem. But when I try to use ussd to show my remaining internet balance it shows error and it ...
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1answer
15 views

Minimal instalation CentOS USB modem LTE internet doesnt work

i am using Huawei USB stick. Unfortunatelly i cannot connect to the internet. Its problem somewhere in DHCP i guess. But i dont know. Could somebody help me ? enter image description here
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21 views

56k Modem to complete contact ID protocol and call local alarm company

I am looking for a 56k soft modem with a usb interface that could be used to complete contact ID protocol to call a local alarm company. I found that the CX90240 chip by Conexant has the ability to ...
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16 views

How to manage audio in and out from and to file of Huawei GSM modems?

I've got a Huawei E173 USB dongle connected to a Raspberry PI. I'm trying to use the device to make and receive calls. For my purpose, it is needed (i) to save audio of the call to file and (ii) to ...
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44 views

ModemManager does not runs pppd daemon for serial modem

I have been connected SIM800 to PC with Linux over serial. ModemManager detected modem. I added new gsm connection to NetworkManager. Now I try establish internet connection by: root@orangepipcplus:~#...
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1answer
90 views

Under Ubuntu 16/18, ttyACM sends unwanted AT commands on connection - how to stop this?

I have some external hardware running embedded Linux (a relatively old version of the kernel), loosely based off the old DaVinci DA850 development board. It communicates with the host PC over a USB ...
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18 views

How to find a modem with a specific conexant chip?

I have been trying to find a modem that uses a conexant chip for a while because they have the ability to put the modem into "alarm mode" using AT commands which fulfills contact ID protocol ...
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17 views

Why root user is not getting “Device or resource busy” response?

I am working with GSM modem and using /dev/ttyUSB2 device. Device is having proper rights: $ ls -alh /dev/ttyUSB2 crw-rw---- 1 root dialout 188, 2 May 25 19:44 /dev/ttyUSB2 I am in dialout group ...
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1answer
439 views

GSM modem - get signal strength

I have setup a gsm connection through network manager (USB dongle, raspberry pi). It connects and works fine by managing it with nmcli. What I would like to see is the signal strength so that I can ...
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27 views

AT modem command, how to detect frequency sent from a call

I am trying to use AT modem commands to call a phone number, receive a kissoff tone (at 1400 hz frequency), send 12 dtmf ones, and receive a handshake tone (different pure tone frequency) I know how ...
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98 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
122 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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348 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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183 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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18 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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46 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 ...
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2answers
3k 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
105 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
221 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
220 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
188 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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1answer
329 views

USSD in ZTE MF833T

The ZTE MF833T modem directly runs as USB Ethernet but is not detected by Modem Manager GUI. I have to manage settings using its IP address http://192.168.0.1/. Is it possible to send USSD requests ...
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4answers
717 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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348 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 ...
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1answer
651 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 ...
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1answer
35 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 ...
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1answer
84 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
263 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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62 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
419 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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55 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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68 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
289 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
78 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
342 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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582 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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302 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
171 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
640 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 ...
5
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1answer
3k 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
107 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
482 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
4k 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
167 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
907 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 ...
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0answers
892 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
968 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
604 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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154 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 ...