T1 line, cisco router and Gigabit?

[hunteralexander]

Please bear with me. I am a network administrator for a small company, with limited experience. I try to do the best I can and like to learn as much as possible.

I have a full T1, a Cisco 1720 router and just bumped my network to 1Gbps with a 3com 2824 unmanaged switch.

I have a couple of questions. I am hoping that someone can please put this all in plain english for me.

My main servers and heavy hitters on the network are running at 1Gb.

My Cisco 1720 router to the T1 only has a 10/100 card in it.

The questions I have are:

1. If the router only has a 10/100 card in it, how are we using more than that on the t1?

2. How to get out to the internet at 1Gb?

Im missing some way of thinking of this. I know I am. The reports say that I am 60-70% utilization of my T1, even though I only have a 100Mb connection to the T1 through my Cisco router.

How?

And if I want to bump it all to 1Gbps through my T1, can I just get a new 1Gbps card for the router and install it with no configuration, or do I need to purchase a newer router setup? Is this something that will matter?

What am I missing?

Thanks for the help.

 

[burtsbees]

First off, a 1GBps internet connection would cost thousands and thousands. The T1 is only 1.5MBps, and the 10/100 is 100MBps, with probably 10-15 actual throughput. If everything goes out to the internet at the same time, that's where you get the most utilization out of the T1.

Burt