SportPlumber

Not sure what that fellow did but they work fine with BI as many here have stated. I have 3 in a BI with plans to add more.

But the amount of activity in these forums alone indicates that the Dahuas are clearly a game changer. Pretty nice little cameras at a market disruptor price level. That is powerful.

Thanks for the rma tip. I will look into that. I have done a factory reset but still see the issue. So if it is a config problem, I can't find it. Thanks again.

I have been using a Cisco SG-200-08P 8 port POE Gigabit switch and have been noticing some frame rate problems. I have four cameras connected to it, 3 are powered over POE. I monitor the cameras with Blue Iris and have noticed it reporting the frame rates reducing on all the cameras at various times. Recently I replaced one of the cameras with a Dahua 2100 bullet. I have another one of these on another network segment and it has always been solid at 15fps. So when I noticed the lower fps, sometimes down to 3fps and clip recording with missing frames, I swapped the switch out with a Trendnet 44. (cheap $60 switch). Frame rates on all the cameras immediately came up to 15fps and remain there. The little Cisco has a great deal of "manageability" and I won't pretend to understand it all. There may be some parameter that is the problem, but thought I would mention it here. Could be that low end Cisco model only. I have had pretty good luck with the Trendnets in the past, but I thought the Cisco would be an upgrade. Oh well. Curious if anyone has thoughts on this? Thanks

I have both the Aircam and the Dahua. Ubiquity cam is real junk. The Dahua is very nice.

If you are powering POE, try local power to the cam with the 100 foot cable. If the camera doesn't have external power connection, try a POE injector.

But the camera still needs to have a removable IR cut filter or it won't see the IR source.

The steel core is usually a CATV variety. While the solid copper core tends to be a "precision" cable that is designed for higher bandwidth applications such as HD-SDI. Typically 1.5 or 3.0 Gb/s. SMPTE 292 and 424. Probably overkill for analog video. There is a great deal of information on the Belden site. http://www.belden.com Belden and Gepco are thought to be the standard in Broadcast, but they are not cheap.

As an old Broadcast Engineer I marvel at the amount of time we spent learning about proper connectors and termination. Just when we thought we had it all figured out with true 75 ohm BNCs and the like, along comes the IT revolution and the RJ45. Is it me or is that the crappiest connector ever made? I'm amazed they work at all let alone after numerous connect-disconnect cycles. Cheap plastic modular stuff probably OK for a POTS line but now we are putting Gig-E through this junk. I mean Cat-6 is amazing stuff but it deserves a better connector! Shouldn't there be a better way? [END RANT] And thank you for the answers on the proper termination practices.

Is the reason for the backbone being solid core simply for a punch block connection? Also noticed that in the picture provided the panduit style block will in fact flex as it is not secured physically. Or am I missing something? Thanks

Just curious what do you do if a shielded RJ45 is required? (UBNT Stuff)

Those Samsung images are really good. Would you mind revealing the camera model numbers?

it must be the most talked about topic on the forum. t3chsupp0rt i take it you have not been installing long ??? people say crimp some compression others say twist on. at the end of the day it is what you are used too. and if used right last just aslong as each other but twist was around for a long time well before we had crimp or compression. i have 80 odd push on BNCs from the 70s no cable strip needed Really? Push on BNCs from the 70s? I'd love to verify that. I think in the 70s there were very few BNCs as most were "UHF" or PL259. In Broadcast, crimp os the standard and zero down time is expected. The rest are junk.

Yes. Sounds like Belden 8279 http://www.belden.com/techdatas/metric/8279.pdf Jacket should be marked. You will need the correct BNC connector. 8279 is slightly smaller than 59 and has a clear-milky dielectric as well as a stranded center conductor.

Well it would be helpful to know what you mean by "testing". What kind of rg-59? New or in an old install? What data rate? 1080P implies 3G/s?

Sure but not with a 3 Megapixel imager! SMPTE 292 and 424 are the HD-SDI transport stream specs at 1.5 Gb/s and 3 Gb/s respectively. The 3Gb/s 424 came along to support 60 frame progressive for sports and can be used for 3D. So I guess it makes sense to design cameras that adhere to the standard but talk about using a shotgun to swat a fly. It is really important to use the correct wire and true 75 ohm BNCs. Even then it won't go to far. Niche market is right!

Some of those Shany cams are 3 Gb/s. That seems crazy to use as a transport for what can't be a very hi-res image. Why not IP? HD-SDI will require good cable at short runs and fiber for anything long. I am really puzzled at what market these are shooting for. SDI at 270 Mb/s is problematic enough. Wonder what they did this for? Be interesting to see what you find out.

Depends more on data rate than resolution. If by HD-SDI you mean SMPTE 292 the data rate will be 1.5 Gb/s. And not all rg-59 is alike. If you use Belden 1505a , which is an rg-59 type but precision, you can go 93m according to Belden. That is not the foam dielectric stuff cable companies use for RF. The rule of thumb for HD-SDI cable transmission is Maximum length = 20 dB loss at 1/2 the clock frequency: SMPTE 292M. So at 750 Mhz , 1505a will be 20 dB down at 93m. Also there will be additional losses that must be accounted for in connectors and patch panels. And you will want some head room to stay away from the cliff.

Sent you a link via PM for the firmware. Hope it helps. Again no experience with Arecont but reading specs makes it look way beyond the Geovision. The Geovision is new and less money, but the Arecont looks very nice. Best regards.

No experience with Arecont but recently purchased the BL-320 and the night vision when in "Auto" mode was very noisy. Manually switching to B/W at night cured this and made a good image. I contacted Geovision support and they sent me a beta firmware version that fixed the night vision. I wonder if this is what your customer saw?

This may sound too easy, but can you lift the ground on the DVR? If the DVR is plugged in to a 3-prong AC outlet, get one of those old plastic adapters for plugging a grounded cord into a two prong outlet and see what happens. This will "lift" the ground on the DVR side assuming there is no other local grounded connection. Assuming video connections are analog? Coax?

Curious what you will think when installed and using. I am using Blue Iris with a mix of IP Cams and one is a Geovision BL-320. I like the images from that camera quite a bit and I have actually had very good response from Geovision tech support. There was a bug with the auto mode for night that made the video really noisy. They sent me a new firmware build that is beta but fixed the problem. Generally happy with Blue iris but it can also be a resource hog.

You are correct that VGA and the variants are valid specs when looking at IP Cameras. My point is that it doesn't tell you much about the quality of the camera's image. TVL on the other hand is directly related to the camera's ability discern detail and also a "valid" spec. It is just as valid with IP Cameras as analogue since it is simply an empirical measurement of image performance. Certainly there are many other aspects to consider such as frame rates, sensitivity, enhancement color rendition to name a few. But I disagree that one "doesn't understand the term" if they are using it in conjunction with IP Cameras or any camera. Regards

Well I guess it depends on what you are used to. As an old Broadcast TV guy I can tell you that TVL is a measure of camera image resolution usually measured by correctly framing the resolution chart and using a monitor to determine the number of visible "Lines" in both the vertical and horizontal axis. To me it seems a more useful way to specify image resolution than saying simply "VGA". VGA is a display format and really doesn't tell you much about the sharpness of the image. Or more specifically the camera's ability to discern fine detail. It is probably true that the marketing folks just want to throw out numbers and it is a carry over from pre- IP Cameras. But it is not related to Analogue or Digital formats. It is a way to measure camera performance. Since there does not appear to be any universal adoption of this or any other method to rate the IP Cameras by manufacturers at present, it does unfortunately seem useless.