Modem is the abbreviation for "Modulator/Demodulator", a device to translate digital signals for transport over analog lines, typically but not only phone lines.

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How to send AT commands to modem once the connection is established?

I have a zte 3g modem. I use carrier provided dialer for connection establishment. Once the ppp connection is active, i would like to send some AT commands(for ex. Query signal strength, AT+CSQ). But ...
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Reserve Ports for modem

I have a modem with 16 ports using for sending SMS. When it's connected to my Linux machine, I get 16 ports from ttyUSB0 to ttyUSB15. Currently if I remove this modem and attached another it,I get it ...
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Does Linux have support for network interfaces over an AT-Command serial modem?

I've got a Telit GM862-GPS module, which is a GPRS modem with a serial interface and uses the standard Hayes AT command set (with some extensions). What I'd like to do is to be able to connect this up ...
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Udev Rule file for Modem not working

I am using modem for sending sms which has 16 ( ttyUSB0 to ttyUSB15 ) ports. I want to make udev rule to give device name "AMPM" and ports should be name Port1, Port2,...Port16. Check out this output ...