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Full Discussion: dial-up internet
Top Forums UNIX for Advanced & Expert Users dial-up internet Post 302149130 by bakunin on Wednesday 5th of December 2007 02:39:45 AM
Old 12-05-2007
Yes, more or less:

Quote:
In dial-up ISP, they varifying our 'username' and 'password' and after verify it...DHCP server assigns IP address to the 'modem'..
It is more like that: your modem opens a ppp-line by calling your ISP and creates a layer-2-interface, just like your NIC would do. Basically for any software working on top of layer 2 (that includes DHCP and any other IP-based protocol) a network card and your modem "look the same".

Not your "modem is assigned an IP-address", but the layer-2-interface created by the modem opening a PPP-line is. I suggest you make yourself familiar with the 7-layers OSI model ( OSI model - Wikipedia, the free encyclopedia ) to fully understand who is doing what.

bakunin
 

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FAXSTATE(8)						      System Manager's Manual						       FAXSTATE(8)

NAME
faxstate - control ``modem state'' of a device used by HylaFAX SYNOPSIS
/usr/sbin/faxstate [ -q queue-dir ] [ -s state ] [ -n ] modem DESCRIPTION
faxstate sends a message to the HylaFAX faxgetty(8) process servicing modem telling it to use the specified state when notifying the HylaFAX scheduler that a modem is ready and available for use. This is useful for controlling outbound use of a modem; by marking a modem's state as busy or down the HylaFAX scheduler will not assign any outbound jobs to the modem. The specified modem can either be the name (typically the last component of the terminal port the modem is attached to), or the full name of the associated FIFO named pipe file, e.g. ``FIFO.ttym2''. If the -n option, faxstate emulates what faxgetty would do; sending a message directly to the faxq process marking the specified modem down, busy, or ready. This interface is useful for send-only environments in which faxgetty processes are not used. Note that modems manipulated in this way must previously have been configured with the faxmodem(8) program. OPTIONS
The following options are supported: -n Contact faxq directly instead of faxgetty. -q dir Use a spooling area other than /var/spool/hylafax. -s Specify the state to send the faxq process each time the modem becomes ready for use; one of ``busy'', ``down'', and ``ready''. The default state to use is ready. FILES
Consult hylafax-server(5) for a complete discussion of the structure and content of the spooling area. SEE ALSO
hylafax-server(5), faxgetty(8) July 17, 1995 FAXSTATE(8)
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