Member Avatar for tricksworld

Dear Linux Users I am new to Linux and i want to connect My Bsnl ets Modem to Redhat Linux 5 Server Edition Please Help me

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This thread shows three common situations: the modem is physically present but the OS never sees it (), some expect only the modem to be changed and not the server (), and restarting networking was suggested (). On Red Hat Enterprise Linux 5 the important first step is proof that the kernel actually detects the hardware — if the device is not detected, higher-level "modem configuration" cannot work.

Quick diagnosis to run as root (watch the output while you plug the device):

  • Run lsusb to capture any new vendor:product id string (VVVV:PPPP).
  • Inspect kernel messages with dmesg | tail -n 50 right after plugging; look for lines mentioning ttyUSB, ttyACM, cdc, eth, or driver binding.
  • List device nodes with ls /dev/ttyUSB* /dev/ttyACM* and network interfaces with ifconfig -a or ip link show.

If the device appears but no interface is created, try loading common USB modem drivers and check kernel modules:

  • Modules to try include option, usbserial, cdc_acm, and cdc_ether. Use modprobe to load them and lsmod/dmesg to watch binding.
  • Some older kernels need a vendor/product id added; modprobe usbserial vendor=0xVVVV product=0xPPPP is a common diagnostic (replace VVVV/PPPP with the hex ids shown by lsusb).

Once the kernel exposes either a serial node or a network interface:

  • Serial modems use ppp/wvdial or pppd (install via yum on RHEL5) — create a small /etc/wvdial.conf with your APN/credentials.
  • If the modem is Ethernet-over-USB, configure the new interface with an ifcfg-<iface> script under /etc/sysconfig/network-scripts/ or use NetworkManager if installed.

If the device is never seen at lsusb, test the modem on another machine (or a current live Linux distro) to rule out hardware/firmware needs. For general USB-modem troubleshooting see the Linux USB FAQ and a practical wvdial guide: and Wvdial (Debian wiki).

Member Avatar for kishorekannan

Just configure the modem, no need of configuring in the os

Member Avatar for goyal

In linux bsnl data card wll modem can't detected. How can solve this prblem

Member Avatar for jino

You just try to restart your network using the command:

# service network restart

May this fix your issue.

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