PBX to router pinout for PRI connectivity

[dhananjayak]

hi,

we are going to connect a PRI link B/W 11C to cisco router, pls tell the below pinout is correct

50 pin amphenol RJ 45
PBX side Router Side

23 -------> 1
48 -------> 2
24 -------> 4
49 -------> 5

Thanks in advance
San

 

[911guru]

It all depends what your router is expecting for TX and RX. You do have the pins right on the Nortel side though

911Guru

http://pbx-e911.com

 

[tnphoneman]

Try it that way if it does not work roll the transmit and recieve pairs.

On the RJ45 side roll pins 1 and 4 then 2 and 5.

 

[johnpoole]

your pins are right.. a csu rolls the pair.. so you may need to roll them back.. i am using a 25 pair amp on an opt 11 that is install local as a backup to the 81 c... if you short pair 23 to 24 the card should go green... a pri will come upm the d will estbalish then drop "wronge mode".. but it makes a good loopback test

john poole
bellsouth business
columbia,sc

 

[khanadil]

why dont you use a bnc cable instead of the amphenol

 

[johnpoole]

i used the 25 pair switch tail because that is what i had at the time.. i could have ordeded one and billed the cust but i had to finish the install that day and have not had any problems that would suggest a layer one problem..

john poole
bellsouth business
columbia,sc