I had to link two HDMI extenders with a CAT5e, because they didn’t work through a wireless link (I don’t know why).
I’m not sure how long the cable is, but using a badly off cable tester, a SC8108, it showed me ~ 190 meters over all 4 pairs.
After some trials (and many tribulations), the HDMI extenders started working when I used as “ethernet extender” a CRS326 and a RB2011. The RB960PGS I had available there, didn’t even negotiate.
I tried one S-RJ01, and also it didn’t never worked.
The RB2011 and the CRS326 negotiated 100 Mbps, on Gbps interface, so my question is: could be this link reliable?
It has to be running only for two or three hours, not longer, then it will be dismantled.
Anyone has some experience with beyond specifications copper link?
My experience beyond specifications is to keep the Ethernet cable as short as possible, as isolated as possible
Maximum is really about 100 metres then collision detection mechanisms “break” the link.
Use some repeater in the middle and you should be fine.
In my practice up to 100m will work fine, longer than this you will have problems. I have reached max of 200m with cat6 SFTP cable and need to force connection to 10M on both sides! So in my opinion don’t use cable in more than 100m.
That is right, with 10Mbit it usually works over longer distance than 100 or 1000 Mbit, but really when you have distances over 100m you should use fiber.
First of all, thanks for all to gave time to write an opinion.
When I wrote, I gave partial informations: a good part of the link was CAT6 (maybe 40 %), but with lightning protection on both side.
But what I wanted was direct experience, not hint.
We didn’t have time to put fiber optic, we cannot put repeater (this was an outdoor setup). The only other way -with what we had- was a wireless link, on which the HDMI extenders didn’t work.
Well, now I can say that a temporary ethernet link shorter than 200 meters, between CRS3xx and RB2011, and if 100 Mbps are enough, is possible, but at own risk (as ingdaka’s experience is really different).
And that it is a good idea to have in stock two S+RJ10.
I read you only today, two days after. Good, ok. Did you hear or read it? I read specs, but I can’t find it.
Well, this is not a problem: on a full duplex link, CD is deactivated .
For what I saw, it is rather a compromise between transmit power and sensitivity.
Most likely the HDMI extenders didn’t work over the WiFi link because it’s not Ethernet. Just because it’s a RJ-45 connector, does not mean it’s Ethernet. For the purpose, there is no reason to encapsulate the video in Ethernet frames.
Well, I would say you were right if the extenders didn’t work even with two switch between.
But as they worked, and RB switches work with ethernet frames and not some exotic MAC protocol, my assumption, they were Ethernet, is probably true.
In the next few days I’ll check if in the MAC table of the switch show up MAC addresses or not.
Thank you for both links.
About your posts on your site: few but well done
cable quality its very relevant in case of long distances
avoid cheap cables
avoid alloy cables, use only full copper cable
6a category cable using awg 23 or awg 22 wire diameter can help to avoid mitigation
shielded cable can help to ensure realiability
on long distance be sure you dont have ground potential differences between sites, because there is a great chance that current flow across your ethernet cable damaging equipment
Note that this only works when there is absolute direct visibility! Like in: you can see a torchlight held up by someone at the other location.
Any walls or other obstacles will interrupt the signal.
Maybe there is perfect visibilty? Maybe it’s easy to install them with short cables? We do not know what the situation is and it could be (!!!) the answer for the problem.
