Re: [ARTIQ] SFP/SATA cables for connecting Ethernet on Sayma

[Grzegorz Kasprowicz via ARTIQ]

Hi Sebastien.
I tested it with simple media converter, it probably didn't care about EEPROM.
I tested it before shipping, so maybe connection was damaged in some other way?
Greg

-Original Message-
From: Sébastien Bourdeauducq [mailto:s...@m-labs.hk] 
Sent: Monday, November 13, 2017 2:59 PM
To: Grzegorz Kasprowicz 
Cc: artiq@lists.m-labs.hk
Subject: SFP/SATA cables for connecting Ethernet on Sayma

Hi Greg,

just a quick note about the SFP/SATA cable that is necessary to connect 
Ethernet on a Sayma directly. I suggest building them from a passive SFP copper 
cable (e.g. http://www.fs.com/products/36649.html) cut in half, with a male 
(motherboard or disk) connector soldered at the end.

Some switches or media converters require a EEPROM or the LOS signal that the 
copper cable provides, and the male connector is more solid mechanically than 
soldering a SATA cable inside a SFP.

The cable I got from you had its transceiver line connections damaged, plus it 
cannot work on my media converter due to the missing EEPROM or LOS (not sure 
which - LOS would be relatively easy to fix, just connect to ground). The 
FS.com cable above is properly detected.

Sébastien

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[ARTIQ] SFP/SATA cables for connecting Ethernet on Sayma

[Sébastien Bourdeauducq via ARTIQ]

Hi Greg,

just a quick note about the SFP/SATA cable that is necessary to connect 
Ethernet on a Sayma directly. I suggest building them from a passive SFP 
copper cable (e.g. http://www.fs.com/products/36649.html) cut in half, 
with a male (motherboard or disk) connector soldered at the end.


Some switches or media converters require a EEPROM or the LOS signal 
that the copper cable provides, and the male connector is more solid 
mechanically than soldering a SATA cable inside a SFP.


The cable I got from you had its transceiver line connections damaged, 
plus it cannot work on my media converter due to the missing EEPROM or 
LOS (not sure which - LOS would be relatively easy to fix, just connect 
to ground). The FS.com cable above is properly detected.


Sébastien
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