setup shell script

I'm trying to work out exactly how my slakware system logs in to my ISP. In my /usr/sbin directory, there's a small bash script called ppp-on; it contains the following function:

function initialize
{
    chat -v TIMEOUT 3 '' AT 'OK-+++\c-OK'
    return
}

Could someone explain what each part of this script does?

Thanks,

David King
ventnor@psinet.net.au
vexilAsked:
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ahoffmannCommented:
chat -v TIMEOUT 3 '' AT 'OK-+++\c-OK'
     ^^ ^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^
     |  |set    | |__ chat script __|
     |  |timeout|
     |  |to 3sec|
     |  |for nxt|
     |  |expect |
     |  |string |
     |  +-------+_
     \--- erbose mode of chat script

The chat script is given as command line parameters, it reads as follows:
    ''     expect (wait for) nothing
    AT     send  AT  command
    OK     expect  OK
    +++\c  send +++ (without a newline)
           this command usualy aborts all modem actions
    OK     expect  OK
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vexilAuthor Commented:
Thanks, ahoffmann!
0
ahoffmannCommented:
e-e did reformat my answer, but you understand anyway ;-)
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