ppp hangs!

[Dead Line]

Hello Everyone,

     Im on FreeBSD 4.8-R Fresh installation.

     I want to use ppp , ppp.conf is already configured.
     cuaa0, cuaa1, tun0  is configured in /dev

     when ever i ppp from command promp. this is what happens..
     # ppp
     Working in interactive mode

     and it stops! then i have to stop it by CTRL+C
     the /var/log/ppp.log  it says

Jul 28 15:46:55 deado ppp[506]: Phase: Using interface: tun0
Jul 28 15:46:55 deado ppp[506]: Phase: deflink: Created in closed state

   Anyhelp would be appreciate it.

   Note: this is for a serial External Modem device,  what is i want to use 
a Internal modem card
            what the device suppoze to be?

   Thank you
   Marwan

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