I know it'
So, why would I need extended POE? I don't have it on the Lorex NVR and no issues
Buying a used Dahua NVR - yes or no?
- Thread starter JPmedia
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bigredfish
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From my understanding when I was deciding on a NVR, the "E" is the ability to use extend mode for the POE. Where a standard cable length is able to effectively do 328 feet runs max on a good quality cable and termination, the extend mode would allow for longer distances using the same cable.
Note that the extend mode is only for the first eight ports. If you look on the built in POE of the NVR, those ports are labels a different color. I honestly didn't need the feature but I did have this feature on my other NVR so decided to get this unit with that feature also as the price was not much more.
Note that the extend mode is only for the first eight ports. If you look on the built in POE of the NVR, those ports are labels a different color. I honestly didn't need the feature but I did have this feature on my other NVR so decided to get this unit with that feature also as the price was not much more.
bigredfish
Known around here
My longest run is roughly 170 feet, so I wouldn't think it would be an issue using either a POE+ port or a regular POE port
bigredfish
Known around here
I just noticed that the current Lorex NVR I'm using has the first 8 ports in green while the second 8 ports are just black, so can we presume it also has POE+ on the first 8 ports?
bigredfish
Known around here
It really depends on the model. Like I said my neighbor's old Costco Lorex NVR runs two of Andy's PTZs (well ran LOL as he finally replaced it with Andy's NVR because the Lorex couldn't pull up the new camera GUI).
POE+ or just basic POE has nothing to do with the max distance of the cable run. It has to do with the max amount of power the port is able to send out. POE is 15 watts. POE+ is 30 watts. Then there is high POE which is 60 watts and higher. Honestly with a regular camera then the standard POE is all you need. Only when you get into multilens cameras or PTZs will you be needing more power. Note that while it may be listed to send out POE or POE+, you are limited by the max POE power "pool" of the switch/NVR. If you go to the power section of the spec sheet, it will list that number there.
Which is why I just use the power supply included with the camera. No worrying about exceeding the maximum POE output of the NVR
bigredfish
Known around here
Actually the question was on ePoE and its both as I mentioned. Otherwise agree as I also said
Dahua ePoE technology achieves long distance transmission of power, video, audio, and control signals over 800 meters at 10Mbps, or 300 meters at 100Mbps via Cat5 or coaxial cable through the use of advanced 2D-PAM3 coding modulation. Dahua ePoE technology offers a new way to accomplish long distance transmission between IP cameras and network switches. It enables more flexible surveillance system designs, improves reliability, and saves on construction and wiring costs.
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Yes. You can do that. It's just that it would mean running another two conductor cable with a 5521 barrel plug to the camera/power supply which most won't want to do. Then need to make sure waterproofing is done on camera side for that plug. Another thing is needing to disable the POE power for that network port on the switch. Yes the port SHOULD auto detect whether or not to send POE power but I have seen times that it somehow didn't work.
POE is POE. As in "power over ethernet". When you turn on the "extend" feature it will take into account that the distance/length will be farther and will adjust for voltage/current drop. Having a port that says POE+ does not automatically mean the port will have extend mode. Having just the standard POE does not mean that it doesn't have extend mode. Depending on the recorder, it may be a drop down menu for the port in the POE menu.
There are switches that have a rocker switch for the extend mode.
I ran 2 conductor wire with the CAT6 lines to all my PTZ locations, it was easy enough to do during install since all connections come from the attic which was relatively easily to access at the time.
If I didn't have a power wire run, then the only options would be to run a cable (not going to happen), use an injector or an external switch
bigredfish
Known around here
Green for the lorex is just same as the green for Dahua and my Amcrest NVRs.. Extended.. So the first 8 ports supports that if your cameras are ePoe then you could use them ports for better connection at longer runs.. Not sure if you are using POE and your 12v power supply. If you are you might want to double check your cameras because not all of the cameras have the ability to support both Power supplies.
Some IP cameras support both 12V DC and PoE for power, and a few of them are actually smart enough to fall back to 12V if PoE is lost. This can be super useful in setups where power reliability is a concern or if you're doing something like testing or temporarily pulling PoE from a switch. or Reboots
Not all dual-power cameras will automatically switch over though. Some will only draw from whatever power source was present at boot, and if that goes away, the camera just shuts down. But brands like Dahua, Hikvision, and Axis tend to build in proper failover logic in many of their models. For example, a lot of Dahua's WizMind and WizSense cameras will run on PoE when it's available and switch to 12V DC if PoE drops, without rebooting. Axis cameras usually support this as well and will even describe it clearly in the spec sheets as redundant power or automatic failover.
It's always a good idea to check the datasheet or manual of the specific camera model you're considering. If it doesn't mention failover or dual input behavior, assume it won't do it. Some budget or OEM models might physically have both connectors but won't actually switch over in real-time. Some of the OEMs even state don't connect them both as it might damage the camera..
Just saying..
Edit: My Amcrest 4216E-AI and my older 5232E-16P both say in the Tech Specs PoE 16 ports (IEEE802.3af/at) 1-8 ports support ePoE & EoC and both of the NVRs have Green in the 1-8 ports..
Some IP cameras support both 12V DC and PoE for power, and a few of them are actually smart enough to fall back to 12V if PoE is lost. This can be super useful in setups where power reliability is a concern or if you're doing something like testing or temporarily pulling PoE from a switch. or Reboots
Not all dual-power cameras will automatically switch over though. Some will only draw from whatever power source was present at boot, and if that goes away, the camera just shuts down. But brands like Dahua, Hikvision, and Axis tend to build in proper failover logic in many of their models. For example, a lot of Dahua's WizMind and WizSense cameras will run on PoE when it's available and switch to 12V DC if PoE drops, without rebooting. Axis cameras usually support this as well and will even describe it clearly in the spec sheets as redundant power or automatic failover.
It's always a good idea to check the datasheet or manual of the specific camera model you're considering. If it doesn't mention failover or dual input behavior, assume it won't do it. Some budget or OEM models might physically have both connectors but won't actually switch over in real-time. Some of the OEMs even state don't connect them both as it might damage the camera..
Just saying..
Edit: My Amcrest 4216E-AI and my older 5232E-16P both say in the Tech Specs PoE 16 ports (IEEE802.3af/at) 1-8 ports support ePoE & EoC and both of the NVRs have Green in the 1-8 ports..
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