Anyone have a good source for loopback plugs for T-1 and 56k? A google search didn't turn up much. I would like to find some that are both the male/female type.

I have a habit of loosing small things so I usually just make some with a little cross connect wire and some 8p8c plugs.

Make them female with a gender changer.

To make a T1 loopback you just run a wire from one pin to the other as follows:
1 - 4
2 - 5

A 56K loopback is this order:
1 - 7
2 - 8

Also makes a cross-over cable by the left column of pins terminating on the other jack to the right column of pins. IE Pins 1&4 terminate to pins 2&5.

i need to buy them for a customer. they need 900 of them.

Uhhhhhh... Hire a high-school kid for $8/hr for two weeks?

Dunno who would make 'em

What would they need 900 of these for?

Express Communications Supply in Florida will do just about any custom assembly work you want.

https://www.stayonline.com/detail.aspx?ID=205

https://www.cablesunlimited.com/pro...king%20Products&Sub1=Cable%20Testers

https://www.shopping.com/xGS-loopback_plug

https://www.smartronixstore.com/index.cfm?fuseaction=product.display&Product_ID=3

The last one is probably what your looking for

Here is the data sheet https://www.smartronixstore.com/downloads/files/Ethr_SuperLooperfinal.pdf

bump

That last item is what I am looking for. My customer is nation wide, and want to make sure they have the ability to test circuits at each remote site. That solves the T-1 issue, but not the 56K issue.

I just bought 3 super looper plugs-the ethernet loopback, crossover, and T1 loopback. My networking teacher last year had them and I really thought they were a nice tool.

For a T1 CSU/DSU:

Its wires 1 and 4 together then 2 and 5 together

For a 56K CSU/DSU:

Its 1 and 7 together then 2 and 8 together.

Maybe they have one for the 56K but are not advertizing it. I would contact them directly and check on that. With an order of 900 I would assume they would go ahead and make some up. As it would not take a whole new dye but just a change in the pins.

https://www.cyberguys.com/templates/searchdetail.asp?productID=11472

Got the SuperLoopers today...shipping was fast and they are nice!!