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ā10-23-2017 12:26 AM
ā10-23-2017 12:26 AM
How to connect SFP J4859C in SM?
Hello!
I'm little bit stuck in testing SFP modules J4859C, so I can't get my switches Aruba 2920-24G and Aruba 2530-8G connected over single mode fiber. I was unable to find how to correctly set up patch cords to SFP module, so I tried to test combinations by changing single fiber on single side one by one and vice versa but it does not work :). What should be the right pinout for this module in single mode set up?
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ā10-23-2017 05:25 AM
ā10-23-2017 05:25 AM
Re: How to connect SFP J4859C in SM?
Generally it is sufficient to cross the patch cord (LC1 Tx -> LC2 Rx and LC1 Rx <- LC2 Tx)...or, in case of fiber optic distribution cabling, cross just one side of the uplink.
I'm not an HPE Employee

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ā10-23-2017 05:38 AM
ā10-23-2017 05:38 AM
Re: How to connect SFP J4859C in SM?
So you mean it should work in setup like in attached picture?
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ā10-23-2017 06:14 AM
ā10-23-2017 06:14 AM
Re: How to connect SFP J4859C in SM?
I'm not an HPE Employee

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ā10-23-2017 06:20 AM
ā10-23-2017 06:20 AM
Re: How to connect SFP J4859C in SM?
Ok, got the idea, will get another one patch and test it in that way :). Thanks in advance,
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ā10-23-2017 08:57 AM
ā10-23-2017 08:57 AM
Re: How to connect SFP J4859C in SM?
Pay attention that you can have a fiber optic distribution system (Fiber Optic Cables interconnecting Fiber Optic Patch Panels) that is partially or totally:
- Straight (Tx connector on one end is connected to Tx connector on the other end and vice-versa)
- Crossed (Tx connector on one end is connected to Rx connector on the other end and vice-versa)
So when you interconnect two Transceivers through a fiber optic distribution system you should know if you need to cross the Fiber Optic Patch Cable Tx/Rx into Rx/Tx (in case of Straight) or not (in case of Crossed) in just one end.
A complication sums up when using specifically a LC<-->LC Fiber Optic Patch Cable: since LC connectors (differently from SC/ST styled connectors) can't be "reveresed" on the LC Transceiver or LC Patch Panel ends...you are forced to use a factory crossed LC<-->LC Fiber Optic Patch Cable if you are working with a Straight distribution system (So, as example: LC Transceiver <-- LC/LC Straight Patch Cable --> LC Connector on Patch Panel <-- Straight FO cabling --> LC Connector on Patch Panel <-- LC/LC Crossed Patch Cable --> LC Transceiver).
So when you perform a LC Transceiver to LC Transceiver direct interconnection through a LC<-->LC Fiber Optic Patch Cable...this one should be necessarily already crossed.
With LC<-->SC (or ST) you have more options because the SC (or ST) Tx/Rx ends can be easily crossed if required.
I'm not an HPE Employee

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