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e1 isdn PRI on x21 to RJ45

bilgecetin
Level 1
Level 1

I will migrate an existing AVAYA site to Call Manager. The existing PSTN connection is through a ISDN PRI. The ISDN modem has an X21 output interface for g703 (120 ohm) and there is a cable converting x21 to RJ45. This setup works fine on AVAYA. However when I connect the RJ45 to my E1 port (VWIC3-2MFT-T1/E1) it doesn't work. I am sure of my controller configuration. I have also changed the framing etc. So there is no problem there. I belive the problem is with pinouts. Could someone make some comments/recommendations if there is any cable doing a proper conversion from X21 to RJ45 for the use of VWIC3-MFT-E1?

2 Replies 2

paolo bevilacqua
Hall of Fame
Hall of Fame

Post 'show controllers E1'.

Note that is very strange that E1 is delivered on X.21, you should actually look at the box the X.21 comes from, or ask telco.

james_be_81
Level 1
Level 1

Hello,

Did you ever found out how to do this ?

Thanks

James