PPP Configuration

Reliance LG LSP 340 Series WLL Modem Setup HOWTO
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# 6. PPP Configuration

Make an easy link to your modem device:

ln `-s` `/dev/ttyS1 /dev/modem`

Now change to the `/usr/sbin` directory and look for ppp files. Look for either a `pppsetup` or a `pppconfig` script. You may directly start this script to set up PPP on your system. On my Slackware system I typed pppsetup and started the script. This script asks for various parameters for connecting via the ISP.

- It first asks for the phone number to dial -- enter "atdt#777", where 777 is replaced by the number that you need to dial.

- It then asks for the modem -- select `/dev/ttyS1`

- Baud Rate -- select "115200"

- Callback -- Answer "NO"

- Modem INIT String -- "ATZ OK "at+crm=1" OK"

- ISP Domain Name -- Leave blank

- DNS Server Address -- Enter a valid DNS Server IP, for instance "202.41.97.3" or "202.41.97.132", or leave blank

- Authentication -- "PAP"

- Username

- Password

Refer to Section 3 for Username and Password.

Finally it shows you your configuration.

Some more work needs to be done. We need to edit the options file present in the `/etc/ppp` folder. We need to check if the following entries are present in the file:

    lock
    defaultroute
    noipdefault
    modem
    /dev/ttyS1
    115200
    crtscts
    noauth
    passive
    asyncmap 0

| The noauth option
| Remember that `noauth` is by default commented; you need to uncomment it.

You can use egrep `-v` `'#|^ *$'` `/etc/ppp/options` to list only the options present in this file so as to quickly judge which ones are missing or incorrect.

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