ā08-22-2011 04:32 AM - edited ā03-16-2019 06:36 AM
Hello Everybody,
I have this MGX 8880 installation at the customer site with VXSM-24-T1-E1-BC back card.
The documentation is pretty scarce on this and it recommends some Ortronics Patch panels that are EoL.
Can anyone explain what type of currently available patch panels can be used with this back card?
And what is the function/pinout of CAB-RBBN-24T1E1 cables?
Thank you.
ā08-22-2011 04:43 AM
Hi,
This is baisically just a 24 pair telephone cable
1 pair for each end device
Look at this URL for pinout
You need the 50-way plug at the card end but you could leave the cable open at the other ennd and have it terminated on a punch block or krone strip
HTH
Alex
ā08-23-2011 01:50 AM
Alex,
Thanks a lot for your response.
I have seen the URL with the pinout that you've mentioned, but the problem is that I failed to find any patch panel (with RJ-48 receptacles) from any vendor that would match the requirements.
Do you by accident have access to any documentation pertaining to the pinouts of CAB-RBBN-24T1E1 as it may be an answer to my problem.
Thanks again,
Nick
ā08-23-2011 04:55 AM
Hi Nick,
RJ48 is basically a posh name for RJ45 when it used for voice.
It uses the standard RJ45 plug
the only pins required are 1,2,4,5
1+2 are the RECEIVE pair for the end equipment like a cisco router E1 port
4+5 are the TRANSMIT pair
So using the doocument that I enclude again the pin out is under the diagram
The top cable is for all the TRANSMIT pairs and the bottom cable for the RECEIVE pairs
I will try to draw out the 1st 2 circuit
E1 Device 1 RJ48 PIN 4 ----------------TX TIP-------------- TOP CABLE 50 WAY PLUG PIN 26
E1 Device 1 RJ48 PIN 5 ----------------TX RING----------- TOP CABLE 50 WAY PLUG PIN 1
E1 Device 1 RJ48 PIN 1 ----------------RX TIP-------------- BOTTOM CABLE 50 WAY PLUG PIN 26
E1 Device 1 RJ48 PIN 5 ----------------RX RING----------- BOTTOM CABLE 50 WAY PLUG PIN 1
E1 Device 2 RJ48 PIN 4 ----------------TX TIP-------------- TOP CABLE 50 WAY PLUG PIN 27
E1 Device 2 RJ48 PIN 5 ----------------TX RING----------- TOP CABLE 50 WAY PLUG PIN 2
E1 Device 2 RJ48 PIN 1 ----------------RX TIP-------------- BOTTOM CABLE 50 WAY PLUG PIN 27
E1 Device 2 RJ48 PIN 5 ----------------RX RING----------- BOTTOM CABLE 50 WAY PLUG PIN 2
and so on
HTH
Alex
ā08-30-2011 03:10 AM
Dear Alex,
Thanks a lot for your elaborate explanation.
I would like to stress the point that the mentioned documentation is outdated as MGX doesn't ship with two separate cables for transmit and receive, but with a single Y-cable (PN: CAB-RBBN-24T1E1).
Thus transmit and receive connectors are joined in a single AMP on patch panel side.
The problem I am facing is that I cannot find the documentation for the said cable.
Thanks,
Nick
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