Receive from an E-1 and send to a T-1

You may be able to find a 3rd party device that will do the conversion for you- but it will be a telecom product, not a cisco product.

That's what (s)he's trying to do with the Cisco 7140 router.

A Crisco 2600 with WIC-2T, an E1 CSU/DSU, and a T1 CSU/DSU should do the job, or anything larger with both kinds of ports.

I understand that they cannot transmit from one to another. I was hoping that the 7140 had the ability to do what pjtemplin suggested. So I'm assuming that Cisco does not have have an all inclusive product to do this?

My understanding initially was what you guys are thinking- how to connect both a T1 and E1 to the same router. Obviously, that's easy. But when I read the question again, it sounds like he wants to somehow connect an E1 interface on one side to a T1 interface on the other end of the same circuit.

That can be done too, but not by Cisco! I guess it depends what he really meant with his question.

We would like to go from E1 to Router then Router to T1.

Which model 7140?  One of the models supports up to 8 serial ports, which could be attached to either a T1 CSU/DSU or a E1 CSU/DSU.

I can't find the 7140 on the website, so I don't know.

Then there's no problem- your 1741 can do it just fine. If you have the Cisco 7140-8T then you already have the interfaces you need. If not, you can buy a 8-port serial port adapter for it. You will need to get the correct CSU/DSUs for E1 and T1 and just cable those to the serial interfaces. An example port adapter would be PA-8T. Not sure if you can still buy those new from Cisco, but there are plenty of people selling the older port adapters. They fit several other models of router including the 7200 series and the VIP cards for the 7500s.

hahaha, I'm not making a recommendation on THIS one on my own...... You guys can help me out with this one.

I say split it between the 3 of us. We all helped to answer the question.