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DSL/T1 and cisco router

in an environment that have  PCs in the LAN, they receive DHCP from windows DHCP server, the PCs are connected to a cisco switch that has separate Vlans, and the switch is connected to a Cisco router that is connected either to a DSL or T1 line.

I need an expert out there to paste the configurations of connecting the LAN to internet through DSL /T1 . I mean 2 separate configurations, seeing that they are different.


thanks
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Case T1 line:
the provider will set up  a box (can't remember how it s called), from there the wire is fed to the Router.

Case DSL modem:
the DSL is plugged to the phone line  and to the router.

I want to know how to configure the cisco router to provide internet to internal user in each case.


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greg ward
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one business use DSL and a separate business uses T1. So 2 separate configurations.
The routers are 28xx series.

thanks
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any updates on this?????
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ISP is providing few IP addresses (3 or 4).
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I believe for the DSL case scenario.
DSL modem is going to give access to internet, but the public ip addresses are going to be static.

For T1 Line the cisco router has DCU/CSU port.
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cisoc router 2811
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Can you explain this please:
ip nat inside source list 199 interface fe0 overload
why fe0 and not fe1?

AND
what does this line mean:
ip tcp adjust-mss 1452


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thanks
Can you explain this please:
ip nat inside source list 199 interface fe0 overload
why fe0 and not fe1?

AND
what does this line mean:
ip tcp adjust-mss 1452

1. nat allows one ip address to be used by many machines
fe0 overload uses the fe0 interface and overload means allow many connections (not one to one nat)
ip tcp adjust-mss 1452
This adjusts packets to an mtu of 1492

Greg