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Configuring CSU/DSU

Hi, I just purchased an Adtran T100 CSU/DSU off of ebay. I have the cable to connect it to my 2500 router (v.35). I'll be using this just for practice at my house. Wont be live.

Right now, it's connected to my router. Where do I go from here? I noticed you can configure the Adtran (has a menu on it). Do I need to configure anything on the CSU/DSU?  Or do I do all the configuration on the 2500?  Can anyone give me some "typical" quick settings to get the ball rolling?

Thanks
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Les Moore
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Thanks lrmoore. I was hoping you would respond.
 I looked at the back, and I noticed the following connections

-Test jack in

-Test jack out

-Test jack mon

-Network Jack

-Channel 1

-Channel 2

1. Since this device is a CSU/DSU, which of the above are typically found on CSUs? And which are typically found on DSU??  I assume being a CSU/DSU device, it does both?


2. What would the "network" jack connect to in a real environment???  Does the "network" jack connect to your DTE?  I have the Adtran connected via serial to my DTE (2500)

3. In a real environment, what would this device connect to?

4. What is the point of Channel 1 and Channel 2?

Thanks!
yikes, correction. It's not channel 1 channel 2. Its *channel in*  and *channel out*
1. The Network jack is the real "CSU" part, the Data v.35 port is the DSU part.
I've never had occasion to use anything other than the Network jack, and the v.35 data port.

> What would the "network" jack connect to in a real environment
This would connect directly to your T1 smartjack terminal. Both are typically RJ45 and usually take a standard CAT5 patch cable.

4. According to the data sheet for this product, it supports 2 video channels as well as voice and data.
Data sheet
http://www.adtran.com/adtranpx/Doc/0/4L118UJ1L1HKVDG551VKFJ2M47/61202052LX-8B.pdf
User Manual
http://www.adtran.com/adtranpx/Doc/0/UDTFG20UPBAH39QU038BE81ID8/UDTFG20UPBAH39QU038BE81ID8.pdf
Thanks. So the T1 smartjack terminal is the demarc??? And the V.35 goes to the router?  I guess this is where I'm getting confused between CSU/DSU.

Also, as previously stated...I have the v.35 connected to my router's s1 interface. But it is showing as physically down, line down.. hmm
>So the T1 smartjack terminal is the demarc??? And the V.35 goes to the router?  I guess this is where I'm getting confused between CSU/DSU.
Yes, exactly!

> But it is showing as physically down, line down..
It will until you either put a loopback on the network port, or connect it to a live T1
ah...I see. So connecting a patch cable between my router's e0 and the Adtran's Network, will make the link live.

Unless I connect to a T1...
>So connecting a patch cable between my router's e0 and the Adtran's Network, will make the link live.
Nope. The Network port is NOT ETHERNET. It is T1 network only. Telco lines carry voltage that your Ethernet port won't like..
Use a loopback plug. If your's did not come with one, make one with a female RJ-45 jack. Loop pins 1-5 and 2-4
Pardon my ignorance, but what exactly does  1-5 and 2-4 mean? I've always wondered. I mean, I know how to make cables...but I never understood what they meant when they said 1-3, 2-6 etc...

Know this is going kind of in the weeks, I appreciate your help!
RJ-45 8-pin connectors are numbered 1-8
Holding the end away from you, with the little clip side to the floor, pin 1 is on the left pin 8 on the right

To "jumper" the pins to make a male loopback, take a new blank RJ-45 end
Take one short wire and put one end into pin 1 slot, loop around and put the other end in slot 5
Take a 2nd short wire and put one end into pin 2 slot, loop it around and put the other end in slot 4
Crimp them down and now you have a very handy T1 loopback plug.
You can do the same with a female jack..
ah I see. And it doesnt matter what color you use, as long as it's consistent on both ends.

So Jack 1 gets a wire in slot  1,  jack 2 gets the wire in slot 5
Jack 2 then gets a wire in slot 2, the other jack (jack2) gets the wire placed in slot 4
I think we've lost something in translation
Same Jack - male or female
Loopback plug

1 2 3 4 5 6 7 8
|  |   |  |
|  \__/  | <= two short pieces of wire
\______/

Crossover Cable has two ends
This is a T1 crossover. Use to connect two CSU/DSU's together back-to-back

1 2 3 4 5 6 7 8        1 2 3 4  5 6 7 8
|  |   |  |_________|  |    |  |
|  |   |_____________|    |  |
|  |___________________|  |
|_______________________|



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Dr IP: So you're saying I need another CSU/DSU to effectively use this setup (to emulate a production environment). I can add an internal one to my 2500???

lrmoore, as for the wiring. Is there an online diagram I could follow or something . I'm still not understanding.
Thanks
You can add an internal one you your 2500 providing it is one of the versions of 2500 that has ports from expansion cards like the 2524 I have for my lab which has 2 internal T1 interface cards.
hmm thanks. Any recommendations?  I'm confused as to why I need 2 CSU/DSUs.... If i get a second one, i will not need a loop back plug right?
Yes, if you get a 2nd CSU/DSU and a 2nd router, then you can plug them in back-to-back just like you did with serial cables, only with the DSU's in the middle. No loopback plug needed if you have 2..
So the routers will still connect via serial (say....ppp encap) and they will also be physically connected via DSU?

Can you recommend another CSU/DSU?   I know Dr IP said there may be some internal ones. I have two 2501s and a 2610
Thanks
btw: is it normal for the adtron to show an alarm condition? (its not connected to a live T1). Its connected to my router only, via a v.35
You can get another Adtran cheap, or you can get a WIC-T1-DSU module off ebay pretty cheap to go in your 2610..
I'm trying to get my web server up so I can post you a picture of a T-1 loopback plug..
thanks. I think I'm going to buy another Adtran. I'm assuming I use a T1 cable (RJ45 end) to interconnect them?  I still need to connect my routers with a back to back serial cable right (because thats where I define the encapsulation)???
Thanks
by the way, my 2610 doesnt have a serial interface. I'm assuming in order to throw a WIC-T1-DSU in it, I would need the serial interface to connect to another router in a lab environment?
thanks for the help guys.
I bit off more than I could chew with this one. Going to purchase another CSU/DSU and post when it comes.

Thanks again!
"by the way, my 2610 doesnt have a serial interface. I'm assuming in order to throw a WIC-T1-DSU in it, I would need the serial interface to connect to another router in a lab environment?"

It depends on how you want to use it, if you are going to connect it to the router with the Adtran via a T1 crossover cable, you won’t.