HP 2920-24G Switch (J9726A) & POE Camera: Achieving 160-170m Distance with FTP Twisted Pair

Hello. A question for specialists - I want to add a camera to my monitoring, which will observe the entrance gate. The distance from the HP 2920-24G SWITCH (J9726A) is approx. 160-170m. I wonder if in this case the 100m / switch / 100m / switch principle should be used as well as in computer networks. Of course, these are only standards and it all depends on the conditions. I could use an ftp twisted pair. Possibly how else to fix this problem. I haven't chosen the camera yet.

For POE up to 80 m.

It all depends on the hardware. The standard says 100 meters because POE comes from structured cabling. However, life already speaks differently. In the department, installations where there were 130 meters and worked, but also those with a problem at 70 meters, I also saw a problem. However, 160-170 is definitely an exaggeration. Well, probably you will use a repeater and choose the power accordingly.

I will say this. I haven't seen it, I haven't tested it, but I'm going to.
http://www.aat.pl/pl/product/2168

Above 100m, you can use the BCS-xPoE4 / EXT - 4-port PoE switch, 4x FE ;)

The xPoE4 / EXT module, which is a 4-port PoE-powered network switch. To ensure the operation of the camera - 200m of UTP cable is divided into two sections of 100m and we use xPoE4 / EXT to connect them. We do not need a local power supply in the place where the module is installed. The xPoE4 / EXT module works with 802.3at, 802.3af and passive PoE switches

NV-208S / P + a bit expensive solution. The BCS-xPoE4 / EXT proposition is cheaper - as far as I know, Cisco also has such a solution. Let me know what I have decided and how it works. Additional question, if I can do tasks in this thread, what external camera should I use to monitor the gate. Requirements - the ability to read the registration number. If the driver could also be grasped, it would be great. Day / night camera - color, distance from the gate is about 10m. The mounting height is yet to be determined. I will use a tin pole for this purpose. About 7m high

tomrom1985 wrote:

which external camera to use to monitor the gate.

Are you asking about the company or the exact model?
How much do you want to spend on a webcam?

I am asking for specific models. How much do I want to spend? I will not say that as little as possible because that is not the point. I think that the maximum cost for the camera is 1000 PLN.

I can honestly tell you that PoE is an electrical signal, I used a twisted pair category 7 at 150m and a PoE power supply + continuous camera 8W with IR and Lan fastened to 100 Mb / s (average is 9
In decline on 100m cat. 5)

I will probably do this by pulling the cable first and checking if it will be OK, and if something does not work, I will add an expander. I have already found out that it all depends on what cable and what is in the vicinity. Power cables don't help

Correct approach, let me know how and how it turned out.

I'll let you know. I just don't know when because I've been running out of time lately. I think maybe a month.

I would try to do it differently: power, let's say 50v, as we know, the current will be smaller, so the drops in resistance will be smaller. Of course, let go in two pairs. And in front of the camera itself, there are step down converters to 12V. This should solve the power problem. Alternatively, if it does not work, i.e. it does not catch the protection signal, the twisted pair should only release the ethernet and the power supply on an ordinary current cable to the ground. I would not make a repeater on the way because it will be an emergency solution I mean water, frost and general erosion of connectors and devices

If I mount the expander, I will do it in a hermetic box. I want to keep the number of wires pulled to a minimum. Of course, the idea of raising the voltage and then stabilizing to the expected value is also OK, only ..... it is all about synchronization and here I would be afraid of failure the most

Overall you have to take a chance. You should buy the cable anyway, black, ie gelled to the ground or to the air. It will not be of a good category, i.e. it will not be cheap. But I would prefer a more expensive cable than enclosing the equipment in a muffle

This is the cable I bought. Gelled, screened due to the conditions that may prevail.

Have your colleagues considered the issue of packet loss when transmitting over non-standard distances?

Did colleagues consider the fact that the camera can be effectively powered in PoE technology and data transmission will be impossible? It seems to me that the topic of this thread is detached from reality (considering whether the rocket will reach another galaxy, but ... without taking into account that the cosmonaut in this rocket will no longer be alive ...).

Arbiter wrote:

if it does not work, i.e. it fails to synchronize, then use the twisted-pair cable to turn on the Ethernet itself

tomrom1985 wrote:

this is all about timing, and that is where I would fear failure the most

I must admit that I was interested in these statements about synchronization in Ethernet. Can my colleagues explain what this synchronization is about, what is synchronizing?

For me, the term synchronization specifically in this topic is the correct transmission of the vision to the recorder. I'm going to put the whole shielded cable in and see what happens. If there is a problem, I will add expanders. The topic may be helpful for others who want to connect equipment over a long distance. I will. He experimented but others will have clear paths

tomrom1985 wrote:

For me, the term synchronization specifically in this topic is the correct transmission of the vision to the recorder.

A very original definition ... It indicates an innovative approach to the existing reality ... :D

tomrom1985 wrote:

I'm going to put the whole shielded cable in and see what happens.

A commendable intention, however ...
First of all - I suggest checking / reading what all types of screens are used for in cabling.
Second - does the use of a shielded cable extend the transmission range in computer networks?
Please also read about the mounting recommendations for the installation of a shielded cable.

tomrom1985 wrote:

The topic may be helpful for others who want to connect equipment over a long distance. I will. He experimented, but others will have clear paths

I sincerely wish you successful conclusions in the experiments! Let me just mention that countless researchers have experimented in the past, which results in adopted standards. In short: for category 5 or higher twisted-pair cable, the appropriate transmission quality is ensured over a distance of up to 100 meters.

I know what the screen is for and I am aware that it will not extend the range, but I am already saying why I want to put it on. Well - in my existing installation - the unshielded cable from the managed switch goes straight to my apartment and is connected to the router. Since then, it has started to disturb me terribly with the radio in the technixa tower, which is about 4m away from the router. At first, I thought that it was the power supply that started to sow - replacing it with another one did not help. Only after a moment of reflection did I check that when I disconnect the twisted pair, the radio starts to play quietly again. In this way, I put another shielded cable next to it, along with shielded rj (adds it, so I wouldn't forget it). Result - my favorite station sounds clean. When I scan the VHF band, I still look for these specific interference somewhere. The disturbances arise from the fact that I have everything on an unshielded twisted pair located in electrical conduits in the vicinity of countless power cables and other installations. To sum up - shielded cable is placed in order to minimize interference. Unfortunately, I didn't do it at the very beginning, but I covered utp cat.6. PS. the mentioned section from the switch to the router is about 35m of cable. I am not a specialist in the subject of CCTV, I learn from my own and others' mistakes. I appreciate the constructive criticism and thank you for it.

Home Switch TP-Link TL-SF1008P ---- Twisted pair Cat 6 .------- Camera BCS-TIP5200IR IP 2MPX 1080P IR 20M at the end, and all this on a 196 m twisted pair works without any problems.

In the middle of the line, if necessary, there is a switch for the switch, but not used because why, so let no one say that POE is 80 m because I will not believe it, anyway, here I was also surprised that it works, even with such a switch.

I suggest that my colleague @ NTI-NT submit a protest note to TP-Link, the producer of the TL-SF1008P network switch. TP-Link clearly misleads its customers by saying that the length of the UTP / STP cable cannot be longer than 100 meters! This is reported in catalog card (for the inquisitive: page 3, Network Media (Cable) item).
The protest note should also be sent to the organization for information IEEE because in their standards (e.g. IEEE 802.3af ) post heresies that were irrefutably refuted by one of the forum members of the elektroda.pl portal! In addition, the document is not available for free for readers who want to confront the nonsense contained there with reality! :D





It's so jokingly - I am asking the moderator for understanding (I could not resist, although I reckon with the fact that the post may end up in the trash as harmful to impatient readers who will read only the first paragraph of this post) and possible readers who will treat the above text seriously.

Now seriously. I strongly agree with my colleague @ NTI-NT's indignation about limiting the PoE supply distance to 80 meters. You can successfully power a device (e.g. an IP camera) consuming 6W (PoE Class 2) from a PoE power source (PSE 50VDC / 15W, using 4 pairs) away from this source for ... 900 (nine hundred) meters.
However, as I wrote earlier in one of the posts - PoE power range should not be considered in isolation from the quality of transmission via the same data cable in Ethernet technology:

treborsz wrote:

Have colleagues considered the fact that the camera can be effectively powered in PoE technology and data transmission will be impossible? It seems to me that the topic of this thread is detached from reality (considering whether the rocket will reach another galaxy, but ... without taking into account that the cosmonaut in this rocket will no longer be alive ...).

Moderated By suworow:

As far as my memory is correct, the regulations forbid mockery and malice, but does not mention anything about substantive statements kept in a playful tone, which our colleague from time to time regrets us. Regards

It`s actually a UPT plug, camera -Switch 150m, Switch-Recorder 150m, total 300m, this is a gel in the ground option.