configuring Cisco 2811, on home network

Have a Cisco 2811, T1 DSU/CSU interface.  This is a newb question.  I have a modem at home that gives off a public ip of (ie... 66.102.1.99).  I only have this one public ip address.  

For mere testing purposes, I was hoping to hook up my Comcast cable modem to the T1 DSU/CSU interface (with RJ-45 cable).  Then on FE 0/0 configure a DHCP network.  Will this work?  Can this be done.  If so how would you configure this on the command line.  
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jkimzlgAsked:
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that1guy15Commented:
Check out this post i think it will give you the information you need

http://www.experts-exchange.com/Networking/Broadband/DSL_Cable/Q_23773004.html
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Don JohnstonInstructorCommented:
>I was hoping to hook up my Comcast cable modem to the T1 DSU/CSU interface

You can't do that. The cable modem has two interfaces (cable and ethernet). Neither are compatible with a T1 line.
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jkimzlgAuthor Commented:
there is also a fe 0/0 and a fe 0/1 ports, can I configure  it there?
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that1guy15Commented:
yeah that is what i was assuming. You will run a cable (rj-45) from the cable modem to the fe port.

donjohnson is right you will not be able to connect the modems rj-45 port to a t1 port but you should have no problems running it to a fe port.
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