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How to test WIC-1DSU-T1 ?

Hello!

Could anyone explain me how can I test two WAN cards WIC-1DSU-T1? Lets say I have not a connection to a service provider, but I have two NM cards in which I can install this WICs. If it is possible what cable should I use?

Thank you in advance.

Viktor.

1 ACCEPTED SOLUTION

Accepted Solutions
Gold

Re: How to test WIC-1DSU-T1 ?

Here's the back-to-back cable pinout for a T1 cross-over that I use between external DSU/CSUs for testing:

5---------------1

4---------------2

1---------------5

2---------------4

I understand this is different from the pinouts in the Cisco document referenced in the preceding post (4 and 5 are reversed here, relative to Cisco's version). It may be that the DSU/CSUs I have been working with are able to auto-correct for the polarity or something. All I can tell you is that in my lab setup, using this cable pinout, I get a rock-solid error-free connection every time. So I never had a reason to question it. (Maybe I'll try Cisco's pinouts, just to see what will happen. I also have an old 2524 with the internal T1 interface, not WIC, we'll see what that does too...)

All you need is some Cat3 or better UTP cable, a couple of RJ-45 8-pin connectors, and a set of crimpers. (Although ideally, you should use RJ-48 connectors and STP cable. But that's not really necessary in this scenario, UTP works fine.)

Mine is actually a surface-mount wall jack (or biscuit) with two RJ-45 ports, and the cross-over wiring done inside. Then I just use regular LAN patch cables to connect to it. Think of it as a "passive T1 simulator".

Since I am not connected to the leased line to receive timing signals, I configure one of the DSU/CSUs to provide it. I don't remember how you would do this on the WIC-1DSU-T1, it's been a while since I worked with one of them, but it shouldn't be too difficult. Something about changing the source from "line" to "internal" comes to mind...

Hope this helps.

3 REPLIES
Bronze

Re: How to test WIC-1DSU-T1 ?

Viktor,

Here is a link that explain's testing with a T1 loopback cable. This should be all you need.

http://www.cisco.com/warp/public/471/hard_loopback.html#lb_png

Daniel

Gold

Re: How to test WIC-1DSU-T1 ?

Here's the back-to-back cable pinout for a T1 cross-over that I use between external DSU/CSUs for testing:

5---------------1

4---------------2

1---------------5

2---------------4

I understand this is different from the pinouts in the Cisco document referenced in the preceding post (4 and 5 are reversed here, relative to Cisco's version). It may be that the DSU/CSUs I have been working with are able to auto-correct for the polarity or something. All I can tell you is that in my lab setup, using this cable pinout, I get a rock-solid error-free connection every time. So I never had a reason to question it. (Maybe I'll try Cisco's pinouts, just to see what will happen. I also have an old 2524 with the internal T1 interface, not WIC, we'll see what that does too...)

All you need is some Cat3 or better UTP cable, a couple of RJ-45 8-pin connectors, and a set of crimpers. (Although ideally, you should use RJ-48 connectors and STP cable. But that's not really necessary in this scenario, UTP works fine.)

Mine is actually a surface-mount wall jack (or biscuit) with two RJ-45 ports, and the cross-over wiring done inside. Then I just use regular LAN patch cables to connect to it. Think of it as a "passive T1 simulator".

Since I am not connected to the leased line to receive timing signals, I configure one of the DSU/CSUs to provide it. I don't remember how you would do this on the WIC-1DSU-T1, it's been a while since I worked with one of them, but it shouldn't be too difficult. Something about changing the source from "line" to "internal" comes to mind...

Hope this helps.

New Member

Re: How to test WIC-1DSU-T1 ?

Thank you guys for your answers.

This cable layout worked with two WICs installed in NMs:

5---------------1

4---------------2

1---------------5

2---------------4

I was able to ping from one card to another.

This layout did not work:

4---------------1

5---------------2

2---------------5

1---------------4

Viktor.

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