Connecting Cisco Router Serial Port to Cisco Router Serial Port (Test Environment)

LGroup1
LGroup1 used Ask the Experts™
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What type of cable (e.g. RJ48 ? specific pinouts ? crossover or rolled ?) would be used for a test environment to connect one Cisco router Serial port to another Cisco router serial port in order to simulate a WAN connection (e.g. MPLS, T1, etc...) ?  Can a regular RJ 48 T1 cable - the one that is used to connect the Cisco router serial port to the wall at the CPE - be used for that ?

Thanks,

ew
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Senior Network Manager
Commented:
Yes..... You can actually make your own if needed. You would only need to cross-over your transmit and receive.



IE:
Router#1                                                                           Router#2
Serial Intf:  Cable pinouts: 1&2(rj-45)  ============= Serial Intf: Cable Pinouts: 4&5
                  Cable pinouts: 4&5            ============= Cable Pinouts 1&2

Reasoning:
T1 Pins 1&2 Are your receive
      Pins 4&5 Are your transmit
Just make sure you transmit from router 1 to the receive of Router#2 and vice versa.

Hope this helps.

Author

Commented:
Perfect, thanks !

ew

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