Hi,
Thank you for your messages.
In my first post, I reversed the two references (J9050D / J4858D). A summary of my tests :
From | Transceiver type | To | Transceiver type | Result (Link) |
2540 | J4858D | TP-Link Switch | TL-SM311LM-v2.0 | Down |
2540 | J9050D | TP-Link Switch | TXM431-SR | Down |
2540 | J9050D | 2540 | J9050D | Down |
TP-Link Switch | TL-SM311LM-v2.0 | TP-Link Switch | TL-SM311LM-v2.0 | Up |
2530 | J4858D | TP-Link Switch | TL-SM311LM-v2.0 | Up |
If I plug the 2540 directly to a switch TP-Link with a short fiber optic cord, it works. By going through the optical fiber between the two buildings, the 2540 does not work. But, it's ok with the 2530 or TP-Link.
For the result of the command "show tech transceivers" :
Cmd Info : show tech transceivers
transceivers
Transceiver Technical Information:
Port # | Type | Prod # | Serial # | Part #
-------+-----------+------------+------------------+----------
51 | 1000SX | J4858D | ******* | 1990-3657
52 | 1000SX | J4858D | ******* | 1990-3657
* third-party transceivershow time
Fri Jun 7 00:05:00 2019
=== The command has completed successfully. ===
Regards.