Question Concerning Back to Back T1 via CSU/DSU

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Hooked up 2 2620s with CSU/DSU modules. Pinned out a cable for it per instructions.

Programmed it for B8ZS, ESF, Internal and Line clocking, and timeslots all = 64. What am I missing for the line to come up?

My boss said I am missing encap HDLC. I am going to try that in the morning.

 

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T1 crossover cable?

 

Yes, assuming I cabled it correctly. I have the correct pin out, but I could have made a mistake when I was constructing it. Since I don't have a cable tester....so if I can't get it up today I will build out another T1 X-over and see if that is it.

 

LAYER 1 issue. Once I rebuilt the cable and did the config it worked fine!!!!!

 

NetEyeBall,

Here's the pinouts for an RJ-48C cable from the Cisco website.

Link:

• Connectors and Connector Pinouts - http://www.cisco.com/univercd/cc/td...0/12_1/pereg_1/pam_gen/pino_app.htm#wp1009374