Jul06
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 Cisco T1 DSU/CSU WAN Interface Card WIC 1DSU T1 US $12.99 
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 Nortel 1750 VPN Router DM1401147 5 Tunnels 128 Bit US $1,495.00
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 Cisco 1720 Router w/ AC Power Adaptor & 15 Day Warranty US $17.50
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 Cisco - 1921 T1 Bundle incl. HWI US $1,441.65
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How can I simulate a wide area network serial connection using two 1721 Cisco routers?
I have two 1721 modular cisco routers, with Cisco T1 DSU/CSU WAN Interface Cards. Is there a way that I can simulate a back to back connection like it is often done with 2500 series routers and dte/dce cables?
Yep.. create a T1 crossover cable.
The wiring is:
1 — 4
2 — 5
4 — 1
5 — 2
Works like a champ! Always keep one in the lab! 
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Crime.And.Investigation.Network.Las.Vegas.CSU.Deadly.Road.Rage.
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