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PRI Pinout

PRI Pinout

PRI Pinout

Hi guys, until now I have very simply hooked up from ISP ONT to IPO PRI E1 with the following: http://www.arcelect.com/T1_cross-Over_cable_and_lo...

In a few days will need to hookup instead to a Keymile Line Runner SHDSL-2 DT which has a 15 pin D connector: https://www.chebucto.ns.ca/Chebucto/Technical/Manu...

Just for sanity checking, would I go from:

CODE -->

D-15        RJ45
3           1
11          2
1           4
9           5 

Sorry for silly question cant find if Tx+ or Tx- on the 15 pin diagram.

RE: PRI Pinout

1-2 are receive and 4-5 are transmit on the RJ45. 1-9 are trans on the d-sub.

RE: PRI Pinout

Does it matter it is Tx+ and Tx- are the wrong way round?

RE: PRI Pinout

Yes, polarity matters.

RE: PRI Pinout


We would normally wire up the PRI terminal with a crossover RJ-48 cable (quite useful http://www.ip-sa.pl/doc/ras/max800-6000/m6hwinst/c...)... everywhere I look agrees on RJ48 to RJ48 no issues there. For RJ48 to D-15:

So would be (I think):

CODE -->

D-15             RJ48
 1 (Tx-)    <->    1 (Rx-)
 9 (Tx+)    <->    2 (Rx+)
11 (Rx-)    <->    4 (Tx-)
 3 (Rx+)    <->    5 (Tx+) 

But then this gives a following pintout: https://supportforums.cisco.com/document/34981/var... seems to be different:

CODE -->

T1/E1 crossover (for PRI and CAS back-to-back connection):  

RJ-48 ----- D-15
   1  -----   1
   2  -----   9
   4  -----   3
   5  -----  11 

Yet this says something different again: http://www.juniper.net/techpubs/hardware/m-series/... and http://www.juniper.net/documentation/en_US/release...

CODE -->

RJ-48 Connector to DB-15 Connector (Crossover) Pinout:

  D-15             RJ48
 9 (Tx-)    <->    1 (Rx-)
 1 (Tx+)    <->    2 (Rx+)
11 (Rx-)    <->    4 (Tx-)
 3 (Rx+)    <->    5 (Tx+) 

Apologies but the more I look the more I get confused, the parity of different sites seems to be different... guidance on which is the correct above would be much appreciated.

RE: PRI Pinout

Always keep your polarity matched. You will be fine. For example if you were going RJ45 to RJ45 it would be 1-1, 2-2, 4-4, 5-5. For a crossover you would go 1-4, 2-5, 4-1, 5-2. DO you have a breakout box? If you will be making your own cable, use crimp pins rather than solder well so you can experiment. But the rule is polarity matches. You can always just buy a pre=made cable from say Black Box.


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