Using a small flat head screw driver or pocket knife remove pins 3, 6, 7 and 8 from the jack so that it looks like this Īs for the color of the wires that go into pins 3, 6, 7 and 8 these can be any color you choose. You can make your very own T1 crossover for pennies on the dollar however you will need 2 RJ-45 jacks, some Cat5 cable and a crimper tool all of which can be picked up at your local hardware store such as Lowe’s, Home Depot, Ace Hardware, etc… (If you’re in the United States).Īnd now for a fun fact… The most common color you will see used for T1’s in the industry is either white or yellow.īefore you start, it’s a good idea to modify the RJ-45 Jacks a little bit.
CREATE LOOPBACK CABLE PATCH
Unfortunately a simple ethernet cable will not magically make the WIC-1DSU-T1’s cards talk to each other because the pin-out schematic is different than a standard patch or crossover.
The 1DSU cards can be cabled using standard unshielded twisted pair cable (Cat3, Cat5, Cat6, etc.) The difference between the WIC-1T and the 1DSU cards is that the 1DSU cards have an integrated DSU and does not require an external box to be connected via synchronous serial. Shown below is a picture of the WIC-1DSU-T1-V2
For the newer routers you’ll need the second generation card known as the WIC-1DSU-T1-V2 which can also be commonly found on eBay for under $10.00Īs for the WIC-1DSU-T1-V2, it will also work in the older routers with the latest Cisco IOS software. While the WIC-1T cards are extremely cheap, the DB60 DTE to DB60 DCE cables can cost anywhere between $5.00 to $15.00 each which can add up really fast in a lab that has more than 5 routers.Īnother common alternative is to use the WIC-1DSU-T1 which is dirt cheap and supported in the older Cisco 1700, 2600, 3600 series routers however WIC-1DSU-T1 is NOT supported in the newer ISR routers such as the 1800, 28 Series. For years people have used the old and untrusty DB60 DCE to DB60 DTE cables to simulate WAN connectivity between Cisco Routers using WIC-1T modules and what I mean by untrusty is that these cables have a tendency to go bad after you move them around a lot in a lab environment.
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