Ihave 4 cisco 1720 Connect Cisco Roters

I have 4 cisco 1720 routers, 2 with WIC 1T, and 2 with WIC-1 DSU - T1. How can I connect all routers for a Cisco Lab?
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Istvan KalmarConnect With a Mentor Head of IT Security Division Commented:

you need CAB-X21 MT and CAB-X21 FC  for WIC1-T:

And you need T1 cross RJ-45 cable:

Best regards,
Ken BooneNetwork ConsultantCommented:
So the two with WIC-1DSU-T1 you can connect back to back with a crossover T1 cable.  Just google pinout for crossover T1.

then the 2 routers with the WIC 1T you will need to get the back to back serial cables for that.

Here is a link for that:

So then you connect one of the wic-1t and one of the other ones up via the ethernet connection.

Hope that helps.
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