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.
205
questions
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0
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22
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No incoming TCP/ICMP packets with Huawei Brovi E3372-325 LTE USB Stick
I'm connecting a linux machine using a nowadays popular Huawei Brovi E3372-325 LTE USB Stick to the internet (more precisely, to a private APN, where IPv4 is used). The special requirement is that ...
- 23
2
votes
1
answer
349
views
USB LTE modem without MAC address?
I'm connecting a linux machine using a nowadays popular Huawei Brovi E3372-325 LTE USB Stick to the internet. The special requirement is that incoming ssh/ping/NTP/... connections must reach my linux ...
- 23
0
votes
0
answers
167
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USB LTE modem "Brovi E3372-325" not working Ubuntu 20.04
This is a continuation of the issue stated in USB LTE modem "Brovi E3372-325" not working
I have a similar issue as LaurentF.
When I try to use the following udev rule
# This is part of ...
0
votes
3
answers
739
views
USB LTE modem "Brovi E3372-325" not working
I have problem new USB LTE modem Brovi E3372-325
I can't get it to work on linux. When connected to a USB port, the modem identifies itself as:
# dmesg
...
[ 6731.401923] usb 1-3.4.4: new high-speed ...
- 101
1
vote
0
answers
44
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How does my LTE modem show up as an unknown type "modem"
I have a Sierra Wireless RC7611 LTE module. I've put what I think are the relevant software versions below:
# uname -r
5.4.215
# nmcli --version
nmcli tool, version 1.22.10
# mmcli --version
mmcli 1....
- 137
0
votes
0
answers
65
views
No connection via 3G modem
I have an ERRCISON F5521gw internal 3G modem which I have been using for years with many versions of Ubuntu, but since I have installed Ubuntu Mate 22.04 it stopped working. Here is output of lsusb ...
- 1
1
vote
2
answers
369
views
How to assign physical USB modem to NetworkManager connection
I work on dual independent modem device (yocto based). I would like to assign each to a different NM connection. I register them using cmd:
nmcli c add type gsm ifname cdc-wdm[0|1] con-name mdm1orange ...
- 41
1
vote
1
answer
124
views
ModemManager + NetworkManager APN switching would kill modem flash?
I am working on a device with Quectel EG25G modem with multiplexed SIM card slot (poor man's dual sim:)). Such configuration will require often APN changing. I am afraid that it is possible to wear ...
- 41
0
votes
0
answers
28
views
Fibocom L831-EA LTE Modem not accessible / Intel Power Management IC Device for Linux
I own an Intel Atom based Tablet PC and I would like to install Debian 11.5
The Tablet is equipped with a Fibocom L831-EA LTE Modem.
Unfortunately this modem is not recognised within Debian, neither ...
- 121
0
votes
0
answers
153
views
4G LTE USB not working on ubuntu
I have bought a 4G LTE USB from Amazon. It works on windows and i was able to connect to 4G using the software that comes with the USB.
I was trying to connect to use the USB on Ubuntu, and i followed ...
2
votes
1
answer
121
views
Internet via audio?
Alright, this may sound a little crazy, but let me explain.
I have 2 desktops, one with a broken Ethernet port, and one with a working one. Both have an analog audio input/output, are running Linux, ...
- 55
0
votes
0
answers
108
views
Unable to used wired modem with usb_modeswitch
I just got a secondhand huawei speedbox LTE mini 2 (E5786s) and it's working fantastic with my laptop. After checking furthermore, I saw that it can be used as a wired modem by directly plugging it ...
1
vote
0
answers
30
views
No access to internet on Pop! OS with new ISP and new Modem
I'm running Pop! OS 20.04 LTS. Recently switched to new ISP (new modem/router). I have no problem connecting to the modem but then I don't have access to the internet. Some things to note:
I only ...
- 111
0
votes
0
answers
106
views
Get tty device paths for zte MF710M modem
i am trying to get the device paths for my modem zte MF710M using this script
#get all connected devices
usb-devices
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 21 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=...
- 103
0
votes
0
answers
26
views
SARA-U201 modem on Beaglebone Black not starting automatically
I have SARA-U201 modem connected by USB to Beaglebone Black single-board computer. It is configured to run in ECM mode by AT+UUSBCONF=2 command.
On boot, there are /dev/ttyACM[0-3] - 4 ports created ...
2
votes
0
answers
281
views
Can’t send sms with ModemManager “GDBus…: Unknown error”
I have an internal mobile modem well detected and currently working for 4G internet. BTW, ModemManager also detect it:
% mmcli -L
/org/freedesktop/ModemManager1/Modem/0 [Hewlett-Packard] MU736
So,...
- 1,112
2
votes
1
answer
180
views
How to verify modem is a fax modem?
An HP 8440p laptop is outfitted with Ubuntu 16.04. It has a RJ11 telephone port, which may be a fax modem. This quick-spec document, provided by usr K-att, indicate it is a fax modem.
Goals include:
...
- 1,176
0
votes
0
answers
515
views
Huawei E3372H-320 AT Commands
I have a modem usb stick Huawei E3372H-320 and I'm trying to get it work with AT Commands.
The problem is that I cannot see any ttyUSB inside /dev.
The modem is recognized lsusb gives me:
Bus 001 ...
0
votes
0
answers
739
views
pppd issue: Hangup (SIGHUP) Modem hangup
I am trying to connect a Telit moudle via USB interface on an embedded board. PPP connection is broken. From log, it shows “modem hangup” at the end.
I did some research on internet and found some ...
- 3
0
votes
1
answer
14
views
ISDN: how to set two channels with serial TA?
Playing with retro-computing I have successfully configured a isdn pci TA, to set up the connection I use a script like this
#!/bin/sh
isdnctrl addif ippp0
isdnctrl addslave ippp0 ippp1
isdnctrl eaz ...
- 11.7k
1
vote
0
answers
530
views
Write firmware over /dev/ttyUSB0 to embedded device
I'm using the last example in: this post
I keep getting wctx:file length=0 after the sz command. I'm actually opening the serial connection with minicom Minicom is botching the transfer. So, after I ...
- 129
0
votes
1
answer
2k
views
ppp connection terminated: "No network protocols running"
I am new to ppp protocol and its configuration and got a problem that ppp connection terminated, no ppp0 created.
This modem(telit lm960a18) works fine with this sim card and APN using network manager ...
- 3
0
votes
0
answers
144
views
hylafax probemodem fails to probe USB modem
On Ubuntu 21.04 I'm having trouble adding a USB modem to my Hylafax 6.0.7 installation. It consistently fails to probe on two different USB modems: a USRobotics 5637 and a generic "USB 2.0 56K ...
- 1
1
vote
1
answer
1k
views
Modem Manager not detecting Qualcomm USB modem on Manjaro KDE
I use Manjaro KDE and I’ve been trying to use my Qualcomm modem on it,
but the modem manager-gui is not detecting it.
Here is the result of lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 ...
- 11
1
vote
1
answer
283
views
ModemManager - Unable to to send SMS with curly braces
I'm stuck on a problem using ModemManager (mmcli 1.14.2) to programmatically send SMS which contains a certain combination of special characters which I have yet to identify.
The SMS I'm trying to ...
- 11
0
votes
1
answer
708
views
script command from socat - /dev/ttyUSB0
A usb-modem connected to my Raspberry PI with Raspian lite.
I've finally found a way to make it connect by issuing these two steps:
sudo socat - /dev/ttyUSB1
and from within Socat I just write:
AT^...
- 103
1
vote
0
answers
352
views
How to run wvdial for modem?
I have some problem during trying run command "wvdial", because i got error like:
--> WvDial: Internet dialer version 1.61
--> Warning: section [Dialer Defaults] does not exist in ...
- 11
3
votes
1
answer
3k
views
USB Modem with modemmanager and networkmanager on embedded linux (yocto dunfell)
I am trying to get a USB Modem working on my embedded system which uses Linux from Yocto Dunfell with ModemManager and NetworkManager.
As you can see below, I am able to connect the modem on the ...
- 41
2
votes
0
answers
101
views
Trying to connect to a PCI Modem
I hope someone can offer some advice, I'm very new to linux/Debian so I'm sure it is probably me doing something stupid.
I have just installed Debian on a pc that was running windows xp. But am stuck ...
- 21
0
votes
1
answer
174
views
Vodafone E3730 unable to usb_modeswitch
tl;dr
Vodafone E3730 HSPA Express Data Card seems not to work at all in Kubuntu 18.04 LTS. How to fix this?
Description
The card used to work. Frankly I don't remember if it worked in 18.04 LTS or in ...
- 17.9k
0
votes
1
answer
237
views
Minimal instalation CentOS USB modem LTE internet doesn't work
I am using a Huawei USB stick. Unfortunately I cannot connect to the Internet. It's a problem somewhere in DHCP, I guess, but I don't know.
Could somebody help me?
- 1
1
vote
0
answers
104
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 ...
- 111
0
votes
1
answer
1k
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 ...
- 178
6
votes
2
answers
474
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 ...
- 1,878
3
votes
1
answer
6k
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 ...
- 545
1
vote
0
answers
86
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 ...
- 11
0
votes
1
answer
708
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:
/...
- 101
1
vote
1
answer
5k
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 ...
- 167
3
votes
0
answers
729
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 ...
- 31
8
votes
2
answers
9k
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 ...
- 81
1
vote
1
answer
191
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, ...
- 1,071
2
votes
1
answer
502
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-...
user56041
0
votes
1
answer
389
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 ...
- 13
2
votes
1
answer
565
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 ...
- 141
1
vote
4
answers
2k
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 ...
- 133
2
votes
0
answers
726
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 ...
- 121
3
votes
1
answer
2k
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 ...
- 9,556
0
votes
1
answer
45
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 ...
- 3
1
vote
1
answer
136
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 ...
- 31
1
vote
2
answers
567
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
...
- 11