E1 back-2-back

jeiko37 · ‎07-02-2002

I have 2 routers 3640 each with E1 (C1E1/PRI) and the physical interface is DB-15 and 120 ohm (balanced).

What I need is testing the 2 interfaces back 2 back before installing it on site.

I searched for the pinouts for the back 2 back cable on cisco.com with no result. Can any one help if it is possible for doing back 2 back cable?

Maulik Shah · ‎07-02-2002

with a db-15 pinout as below:

Connect the Tx to Rx and vice versa for a cross over cable.

jeiko37 · ‎07-03-2002

thanks.

jeiko37 · ‎07-23-2002

I tried the following pinoutes:

From the CE side to Network Side (provides: clock source internal)

8-1, 15-9, 7-2, 9-3, 2-11, 10-4.

But After configuring the 2 sides, I did a sh cont e1 0/0 I have the Receive Signal Loss error msg for both sides and the remote alarm is on?

Do you have any idea?

Thanks in advance

Report Inappropriate Content · ‎07-23-2002

May be u can try with this pin assignment

DB 15 Connector (120 ohm)

DB 15 Connect#1 DB15 Connct#2

9 to 8

2 to 15

I hope it will work

Good luck

Report Inappropriate Content · ‎07-23-2002

Sorry Jeiko,.........some pin assignment was missing,..........I'm going to compeletely,.........

Connect#1 Connect#2

8 to 9

15 to 2

9 to 8

2 to 15

10 and 7 are for grounding