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Questions tagged [modem]

A device that can modulate (convert analog signal to digital) and demodulate (convert digital signal to analog)

A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data.

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Linux boot with usb 3G modem enabled as ttyACM0 device

im running Ubuntu 14.04.1 LTS (desktop), on an embedded device (Odroid U3) and on boot, my 3G usb modem is seen as a ttyACM0 / ttyACM1 device, which is correct. Post boot i am able to simply run wvdial..and from there I can get a connection... I am…
user3312154
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Getting Callerid from serial port with Conexant USB CX93010 modem?

I have a C# code but it doesn't takes a CallerID from dial up modem connected to USB port when I connect line to phone. It gets CallerID but in program run and in reading line I have just RING nothing else. This is my code: public partial class…
muxammed
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hylafax not sending fax using iaxmodem

Hi everyone i am having an issue with Hylafax + iaxmodem + asterisk/freepbx. It is odd because i can receive faxes correctly and don't have any issues, but when i try to send a fax using hylafax it just says no answer from remote and when i am…
CiE
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Detect response from Modem?

I'm working with a Teltonika G10 GSM modem and wrote up a basic program to send out SMS. I put a 1.5 second timer between each AT command to allow the modem to simulate the wait for the "OK" from the modem. This works for now but I'd rather use a…
GoodBoyNYC
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Going wrong while adding items to list view from serial port..

I am reading the serial port to read the messages present in the gsm modem, and then displaying them in a listview. But i am ending up having a list view with redundant items. I am unable to understand why this is happening.. { …
Shiridish
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PSTN issue. No dial tone for modem

I am having an issue with a pstn line connecting to a modem. The modem can not get a dial tone but when I plug in a normal telephone it can. What are the troubleshooting steps for this and potential fixes? Would a line filter do any good and Is…
Axle
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Network Modem for Gammu Device

I'd like to configure Gammu SMS Gateway to work with a network GSM modem. The modem has a LAN IP address. Is it possible? The documentation I read only mentions serial/USB connections.
alboforlizo
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Huawei Cdma Modem, How can send sms via C# App OR AT command

I've huawei EC156 cdma modem, I tried to send SMS via AT commands with many commands, But always received response "command not support". I have used the following commands: 1- AT+CMGS 2- AT + GWWC Also, I didn't find any C# Libraries dealing with…
user3453048
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Why is a DNS server needed when setting up a static ip

So I am setting up my at home server, and I am setting up my static ip address. I noticed that I need to input my ISP's DNS servers. Why? It does not seem to list a DNS server for DHCP. If I truly have a static ip address (which RCN, my ISP, claims…
Andrew Wilkins
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Is there any API for USSD requests for a usb modem

I am starting a small topup buisness in my country and for different reasons, I had to use a usb modem to make the USSD request which my buisness depends on The best modem I found is Huwaui e3531 usb modem The way I was thinking on buidling my…
mastin oulak
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How to connect an embedded device to Internet via a Windows 7 PC's Shared Internet Connection (ICS)?

I have an embedded device (runs linux) that is connected to my Windows 7 workstation via ethernet. My Windows 7 computer is connected to the internet via usb modem (ppp protocol). Can I connect my device to the internet somehow without connecting…
Shlomi
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Huawei E303 Modem change default IP

I am trying to use more than one Huawei E303 modem on the same computer. However, it appears that the modem starts with the default IP 192.168.1.1, so when more than one modem is inserted, they conflict. Is there any way to change the default IP of…
Fabio Avila
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How to hide modem setting page from public IP

I have a problem setting up a test server on my local machine, whenever I open my public IP (122.168.XXX.XXX) from a web-browser it opens my D-Link modem setting page instead of denied access. It means that my modem setting page is open to public…
neeraj nigam
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Can I get access to router locale interface from internet?

Standart local address of router is 192.168.1.1 to administration interface. Can I get access to router from internet if I know IP adress of local network and IP of router?
Babaev
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Is it possible to replace AliceBox DSL by any modem router

This alice box (O2) is used only in germany so it might have contry dependent specifications. For home use, I would like to replace the standard Alice DSL box by a linksys WRT54GL, which is a very configurable router, in order to use the Quality of…
Lokinou
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