Questions tagged [modem]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
25 views

Creating a gsm (LTE) connection without APN in NetworkManager

I work with a device that has an LTE modem, which has been working properly so far for many users out-of-the-box without having to configure its APN - this is not the case for all users, some of them ...
user avatar
  • 101
0 votes
0 answers
13 views

How to get a static internal IP for a 4G modem using ModemManager and NetworkManager?

I have around 16 EM160R-GL 4G USB modems connected to one Ubuntu server, which I use NetworkManager to dial up to the ISP. The problem is that the network interface I am getting on my machine has an ...
user avatar
0 votes
0 answers
17 views

Strange Port Forward Behavior

I have multiple facilities with a Sierra Wireless Modem/Router with ports forwarded to an Ubuntu Edge Computer (443 web interface, 22 SSH, etc.) Recently, we're seeing strange behavior where the ...
user avatar
0 votes
0 answers
20 views

Remote Access CPU with Different Gateway IP Sierra Wireless Modem

Suppose I have a facility with a simple, flat, LAN on the 192.168.1.x subnet. However, it has two Gateway devices (Sierra Wireless RV55 cell modems) - one at 192.168.1.1, and the other at 192.168.1.2. ...
user avatar
0 votes
0 answers
270 views

How to create VLAN in ZTE ZXHN H298A Router

I have a router / modem called ZTE ZXHN H298A V1.0 TTN.19T4_210317. I'm sharing my network with neighbours but I want to capsule my network and/or the guests network to protect my local network. So I ...
user avatar
0 votes
2 answers
25 views

ISP configured Dynamic IP is different from what websites see when I access them

We switched our internet connection and now something wired is going on. I am using a TP Link Archer 1600 modem. The ISP asked me to set connection type as "Dynamic IP" under EWAN settings. ...
user avatar
0 votes
0 answers
46 views

How configer call center module in elastix with chan-dongle

I installed elastix with 10 dongle usb modem ,thay work fine and create 10 trunks for this modems now when i make outgoing campaign in call center choose (By Dialplan) in trunks and make context (...
user avatar
0 votes
0 answers
114 views

Strongswan IPsec ignores empty certificate request

I am trying to set up a certificate based VPN connection to a modem (a Digi WAN Connect 3G) in the field. Using ipsec version Linux strongSwan U5.8.2/K5.8.0-55-generic on Ubuntu 20.04. I am pretty ...
user avatar
0 votes
1 answer
39 views

How do I hook up a business modem with 6 ports to a switched network? [closed]

I have a small business modem that has 6 ports on it, each being a static IP. My network has grown however to the point where I have more than 6 devices, so I am moving to use a switch, which has ...
user avatar
-3 votes
2 answers
83 views

Do modems have public address? [closed]

I know for a fact that when we are connected to Wi-Fi and we search something in the Internet, the server we are requesting from will return the files to our IP address and this IP address is the ...
user avatar
  • 3
0 votes
1 answer
417 views

Strongswan works on embedded device via ethernet but not with 4G modem

I have a Gateworks SBC with an installed Ubuntu 20.04. My SOC is connected with an USB to ethernet adapter (eth0) as DHCP Client (192.168.88.102) to my Mikrotik router (DHCP Server), which acts as my ...
user avatar
1 vote
0 answers
1k views

What `LCP TermReq` after `IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1 0.0.0.0>...` means?

What LCP TermReq after IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns... means? Short snippet: Sep 16 01:39:13 raspberrypi pppd[581]: rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01>] Sep 16 ...
user avatar
0 votes
2 answers
146 views

Permission denied in Kannel server

Kannel Server is giving me this error on /var/log/kannel/smsmodem.log I have a Centos 7 server with kannel-1.4.4 2020-07-23 17:39:00 [4245] [6] ERROR: System error 13: Permission denied 2020-07-23 17:...
user avatar
1 vote
1 answer
1k views

High ping latency over direct Gigabit Ethernet link on Enterprise-class hardware

FINAL EDIT 7/7 Multiple cable, port, and device substitutions have narrowed this to the Comcast modem, and on all 8 of its Ethernet ports. Given, as the comments say, this is a closed device, and ...
user avatar
  • 374
0 votes
1 answer
2k views

How to access the page of a bridged modem with a different default IP from the router?

I set up a modem as a range extender as in this thread. Initially I set it to WDS-only and could connect only via ethernet, so I wanted to login to the modem and change to Hybrid to also connect via ...
user avatar
0 votes
2 answers
2k views

NetworkManager gsm connection on Simcom SIM5320A via serial port is failing

Device Hardware: Raspberry Pi 3 OS: Raspbian GNU/Linux 10 (buster) NetworkManager: 1.14.6 ModemManager: 1.10.0 Modem: Simcom SIM5320A connected via UART to the port ttyAMA0 Problem I don't think ...
user avatar
  • 9
0 votes
1 answer
228 views

Mobile Broadband on Ubuntu 18 (Jetson Nano)

I am having trouble setting up cellular connection to T-Mobile with a Huawei E220 stick. It used to be able to connect but it does not connect any more. PIN is disabled, and stick works fine under ...
user avatar
  • 73
2 votes
1 answer
92 views

Hook second router to internet wirelessly?

I have a router hooked up to a modem, and I have another router. What I want to do, is have the router broadcast a completely different network than my other router, but still have my second router ...
user avatar
  • 123
0 votes
2 answers
68 views

Got a second modem, is my setup correct?

I got a second modem to use with a second internet provider for my small business. To install that second modem on my network, I purchased a Dual Wan Router to take care of the load balancing. Here ...
user avatar
  • 155
2 votes
1 answer
169 views

How to get my fax modem to work with newer phone lines (and HylaFax)

For a long time I've been using a HylaFax server and an old external 56k serial port modem. It has worked great on our POTS lines. Recently we just upgraded our location and it now has an AT&T ...
user avatar
  • 1,574
2 votes
1 answer
91 views

USB Modem soft reinitialization [closed]

I'm using an USB 3G/4G modem to access the Internet (connection with wvdial) but also to query my account usage, recharge and buy data offers with AT commands on the serial ports. Sometimes the modem ...
user avatar
  • 123
2 votes
0 answers
32 views

USB broadband 3G connecting to a wireless router

In my workplace, the ADSL / internet line (which is connected to a TP-Link router) is down, so I need to use a USB 3G broadband modem to give other computers internet access. I was wondering if there'...
user avatar
0 votes
1 answer
706 views

rndis & centos 7: can't connect to usb modem

i have 4g modem, which shoudld work via rndis. after inserting it in usb, i get these network interfaces: enp0s29f2u1 eth0 but, i can't configure it. after doing eject -t cdrom i get another ...
user avatar
0 votes
2 answers
3k views

Linux pppd fails but NetworkManager works

So I'm trying to get my PtP modem "Telit ME910" connected to the Verizon LTE network via pppd using Ubuntu 16.04. If I hook it up and go through the standard Network Manager steps of "Enable Mobile ...
user avatar
  • 41
1 vote
1 answer
111 views

Server as phone behind eMTA

I've been tasked to research automation options for telephony modem/gateway device testing with a group of DOCSIS voice engineers. For each new DOCSIS device with an eMTA that we receive we need to ...
user avatar
0 votes
1 answer
2k views

PPPD refuse to work with Sierra : HL7690

I am trying to get a working connection with PPPD in 4G with Sierra HL7690. Every time I launch PPPD I get a either a "NO CARRIER" or a Modem hangup. The sequence I use is the following : Reset the ...
user avatar
  • 111
1 vote
1 answer
261 views

Periods of high packet loss, two ethernet cables plugged into TWC modem

A small business for which I am the system administrator has been experiencing intermittent internet dropouts. There seems to be no pattern to the dropouts — sometimes there is nothing for a week, and ...
user avatar
2 votes
1 answer
4k views

PPP / 3G modem not getting an IP: No network protocols running

Modem in use: SIM5310 connected to an ARM based board. root@cm-debian:~# uname -a Linux cm-debian 4.4.0-cm-t335-5.1-00030-gd350d89-dirty #29 SMP Sat Nov 4 19:18:48 PDT 2017 armv7l GNU/Linux I am ...
user avatar
  • 101
1 vote
1 answer
289 views

Optical fiber modem with fiber output

Is there a modem that has a fiber optic output? I have an internet connection, where I receive the signal via fiber optic, I already have a modem, but the output of the modem is RJ45, and on my ...
user avatar
1 vote
0 answers
261 views

Troubleshoot random Network disconnection (USB Modem)

In general how to debug random network disconnection issues? I am working on Intel Edison board which is connected to the internet via a Huawei E8231 USB Modem. Few devices loose the internet ...
user avatar
  • 111
0 votes
0 answers
460 views

RAS server in linux with analog modem

i known that the analog modem is a old technology, but in my enviroment i need it. I have a server connected to a network 192.168.0.0/24 and all the internet is routed throw 192.168.0.254 and in the ...
user avatar
-2 votes
1 answer
47 views

Modem for optimal Wi-Fi router placement

I'm trying to set up a wireless network in an old building with very thick walls. The 80Mbps VDSL2 connection arrives in possibly the worst place in the building - a router placed within a sensible ...
user avatar
  • 147
-1 votes
1 answer
55 views

How to know if 2 ethernet ports of the same modem are separated?

I have a Digi TransPort WR family of 3G/4G cellular routers with 2 ethernet ports, digi told me that the ethernet ports are separated but i want to know if they are not in the same network it's a ...
user avatar
  • 1
1 vote
1 answer
2k views

how to make sure modem is truly in bridge mode

I need public ip in pfsense wan interface so I configure my adsl modem as bridge mode But I have little doubt on this "it is truly in bridge mode". What are the steps to make sure about bridge mode ...
user avatar
1 vote
0 answers
180 views

Wan ip always 0.0.0.0 after set bridge mode

I try to set my my modem(unnanti A-300M) as Bridge Mode (set eventhing as a default), After getting wan addr is 0.0.0.0. Easy for your reference note: unnanti A-300M = Modem + Router
user avatar
1 vote
0 answers
135 views

Netgear Prosafe SRX5308 config with Virgin Superhub

We have just bought a Netgear Prosafe SRX5308 to provide load balancing with our 4 internet connections, but I am struggling to get it configured with our Virgin Media connection. The auto-detect ...
user avatar
  • 31
-1 votes
1 answer
572 views

Can we use a ADSL2+ modem in bridged mode to convert to ethernet WAN? [closed]

I am no networking master, so I have no clue if this makes sense. I have a DSL line from my internet provider with all the service details. Now, I have a TP-Link modem (+router) WD8961N. This is ...
user avatar
2 votes
1 answer
532 views

Hylafax doesn't answer

First, the configuration : OS : Linux Debian 3.2.68-1+deb7u6 x86_64 GNU/Linux Hylafax 6.0.6 Modem : USR 56k model 5630 (RS232) set on ttyS0 I think my settings are quite good, when I test my ...
user avatar
  • 149
1 vote
2 answers
2k views

Is it possible to assign an ISP provided static IP directly to a computer that is wired thru a dhcp enabled router before jumping to the isp modem?

Ive got a block of 5 static IP's from the ISP at this jobsite i'm currently on. the POS vendor installed a router, connected it to the modem, and did not configure it with one of the ISP's static IP's....
user avatar
  • 23
3 votes
2 answers
986 views

GSM Modem for linux [closed]

I am looking for a GSM modem capable of sending SMS to be used in CentOS 5.3. In the other word, how can I make sure if a specific modem can be detected on kernel 2.6 before buying it.
user avatar
  • 131
0 votes
1 answer
272 views

Monowall can't connect via Cisco DPC3941B Modem/Router

We have a monowall router behind DPC3941B, having trouble connecting to internet. Just purchased static IP and still can't get it to work. Comcast says everything looks good on their side. Modem is in ...
user avatar
  • 139
0 votes
1 answer
82 views

SonicWall configuration

I currently have a SonicWall and I'm attempting to connect it to my router or modem's LAN interface. This is for testing and will not be the network design in production. When I plug it in with the ...
user avatar
4 votes
0 answers
633 views

pppd terminated bya SIGTERM in Centos 7 -- who's sending it?

Folks, I created a script to keep a persistent "emergency" connection with a 3G modem, so I can access my CentOS 7 makeshift server remotely if the usual network fails. Everything works for a few ...
user avatar
1 vote
0 answers
72 views

Physical stats of cable modems

I am interested in what physical stats are available for cable modems and what they say about that modem. I can think of the that sound important to me: The ability to cope with strong or weak ...
user avatar
  • 143
3 votes
2 answers
14k views

Is there any disadvantage to putting a modem in bridge mode

In order to prevent the need of port forwarding and double natting I plan to put a modem into bridge mode. Are there any side effects or problems that could come of placing a modem into bridge mode in ...
user avatar
  • 3,811
1 vote
1 answer
5k views

How to use two different ISP on same LAN with one Ethernet switch?

Sorry if same question is asked on Stackoverflow. I searched and tried some configuration but are not working in my case. I have a LAN with 6 machines which are on same network (each other can be ...
user avatar
1 vote
2 answers
3k views

How to replace a hardware modem by virtual modem

I have an embedded device that is connected by an old dial-up modem to the Internet. I cannot change the embedded device but would like to connect the embedded device to a Linux machine that has an ...
user avatar
  • 13
1 vote
0 answers
103 views

Gateway/Modem overload when running a web spider

Problem: All other devices on the network experience serious lag and timed out web pages, email, chat dropping, etc while this is running. This is a cross post from stackoverflow, I may have used the ...
user avatar
0 votes
1 answer
200 views

Modem, Router, Switch configuration [closed]

I have two switches in different rooms, both wired to a router (LAN ports) which is in turn wired (WAN port) to a cable modem. I want to switch from cable to DSL for cost reasons, but keep the router ...
user avatar
  • 3
0 votes
1 answer
75 views

modem rejects logon credentials If I try to connect through http://modem/. works fine if I connect with http://<ipaddr>/

This is a real bugger:) My modem is a ZTE ZXHN H108L, connected to a linux firewall/router/gateway. The gateway is a Slackware 14.0 system on which DNS, DHCP, VPN and transparent PROXY run. The ...
user avatar
  • 538