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How to Connect cisco 3640 Router PRI back to Back

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Rad33

Vendor
Joined
Sep 19, 2002
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2
Location
CA
Hi need to connected 2 Cisco routers back to back using controller - PRI-ICT1-CSU , in both routers ..
I am using T1 cross over cable (Layer 1 is UP )but protocol is down..
thanks for help in advanced
 
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