April 7, 2014
Greetings! I am a techie (software guy) and new to cctv. During my research for a system to protect my home, I discovered CVI thanks to one of your videos. For me, it is the best option.
My questions relate to being able to separate the data storage from the DVR box. My questions do not apply directly to the products you currently carry but extend into the full realm of equipment manufactured by the brand name that is not to be spoken.
1. Is Linux embedded in the box or does it boot from the SATA HDD?
2. Is the internal SATA required for booting and then using a usb 2.0 drive, or can you simply just use the external drive for everything? Are there bit rate problems with 8 cameras using the usb drive?
3. You are selling the 1U frame devices. Moving up to the 1.5U and 2U frame devices there exists the eSATA connection and PTZ option. Again, in relation to bitrate, would this eSATA be required to run 4/8/16 data storage physically separate from the dvr box?
My ultimate goal (necessary) is to have a separate and removed HDCVI storage that is fireproof and waterproof.
Thank you for your help!!!!
Good afternoon and thank you for the interest.
1. Linux is embedded. The drive is for recorded footage only. The DVR does operate with out drive if you like, but no recording.
2. drive is not required for boot. OS is stored on main board.
3. DVR does not have esata port yet. I have no ETA on if and when either.
4. remote back up would be best set up http://FTP.
- you will need a drive installed as dvr has to record to something first.
- FTP can be setup to back up to a network device.
5. Bit rate is going to be dependent on what you set the bit rate and resolution to in the encode options. It can be set very low and high like 8mb. If you have a huge backup it could take a long time through. Getting a version with Esata is the way you want to go im thinking. It is alot faster.
Welcome to our forum and to the world of CCTV. If you are a techie, then you have found the right industry and place to enjoy your passion. I will let some of the techs and other members weigh in on the more technical side, but I wanted to address the name that cannot be spoken...The actual factory that manufacturers our DVRs, NVRs, and most of our PTZs, CVI cameras and IP cameras is Dahua. There is no reason for the name not to be spoken. We have been selling OEM Dahua products for nearly 8 years now. That is longer than most of the other companies that can be found on the net. We discovered early on that Dahua was a leader in the industry and I don't think that you will find another team that knows these products better.
As for the rest of your questions, someone with more skill will answer what I do not address. I can tell you that the OS is embedded in the hardware and not on the SATA HDD. A Hard drive is not required to boot or operate the recorder, but I am not sure about recording directly to a USB drive. I do not believe you will be able to do this. The USB, ( I believe) can only be used for back ups and not for recording. There is an ESATA port on our 1.5 and 2U devices which will allow you to connect up to 4 additional drives which can be used for recording.
For the BIT rate limitations, I would like one of our techs to respond.
April 7, 2014
Daniel and Brad.... thanks for the quick response.
Daniel, I'm really not interested in using a network backup unless it can be configured to mirror the main HDD in real time. I need a real time solution in the event there is a break-in and they decide to burn my mobile home to the ground. As far as internet backup goes....I am bandwidth limited living in the country with satellite internet. There already exists a solution to my problem which is a fireproof, waterproof eSATA HDD. I just needed to understand how the DVR operated and that I can configure it to write directly to such a drive remotely located and safe from theft AND fire.
Brad....you mention the 1.5U and 2.0U frames but at this point they are not available through your company?
Sorry for the misunderstanding about Dahua. I think they have a great product but I don't understand or agree with their USA sales policy which is probably costing them a fortune while making things more difficult on would be customers such as myself. Having to "cross identify" products from companies not allowed to display Dahau brand name and part numbers is confusing and unnecessary by any marketing rules that I understand.
Thanks again, Kerry
The issue with Dahua is quite complex and is actually not isolated to only Dahua. Unless a factory in Asia has their own distribution channel in the USA, everything they produce for USA customers is OEM. Sometimes this makes perfect logical sense, especially when you have custom changes made to the specifications of a product or a housing design, and other times it is literally just an exact replica of everything else coming off their line with simply a different label on it. Either way, this is common practice with almost every factory in our industry. It does make it more difficult for the consumer if they want to purchase products manufactured by a specific factory but most end users aren't familiar with the various factory names anyways. Again, this is a complex issue and I could spend all day explaining the nuances, but I won't bore you with it.
You are correct, we do not yet offer the CVI DVRs in 1.5U or 2U versions, but they are in route. Meanwhile, there are other solutions. You can purchase and NVR and stream individual channels from the DVR to the NVR for backup recording. You would place the NVR inside the network but away from the DVR.
You could use the PSS software to record from the DVR on a local PC 24/7
You could split the cable coming out of the camera (not 100% sure of the quality degradation) and run that to a second DVR.
These are just some temporary options.
Brads going to have to chime in on that part. I really do not know when we are going to start carrying the larger units. As for the esata backup its not too difficult to setup. Just connect a drive to esata port then go into HDD management and tell DVR there is a drive there now. If you want you can always set up PSS to record to a computer on network then push data else where.
April 7, 2014
Here is a link for all the different versions we have.
They are all free go ahead and load it up take it for a test drive. With out a dvr connected you wont be able to try playback, or look at DVR settings but the rest of the features of the software you can see.
April 7, 2014
Brad.....I had thought about splitting the signal too, using a resistor voltage divider but then I see there are high bandwidth splitters from mini-circuits. I suppose an active balun system would work and you can adjust the gain on the receiver. I would have thought that a normal active balun would not work on a HD signal modulated with an analog signal??? Bandwidth on normal cctv is 6 Mhz whereas it is 65 Mhz for HDTV. Do you guys use your active balun on HDCVI????
April 7, 2014
We need to test splitting the signal if you want to go that route. I would not recommend using CAT5. We found the best signal transmission using good quality RG59. My thoughts are that as long as the lengths are less than a couple of hundred feet you could simply split the signal using a barrel connector.
April 7, 2014
By barrel connector; I assume you mean a Tee? I'm guessing you might be right with short lengths.
The perfect test for me would be one camera connected by a 100 foot rg59 cable to a splitter. One output connects to channel 1 with a three foot cable. The other output of the splitter would run through another 100 foot cable which connects to channel two......compare quality between the channels.
You don't have to do this for me, but surely in the future there will be other people wanting to protect their data in the same way that I want to. I'll not waste anymore of your time because I don't think I will be buying anything but cables and power supplies from you. The reason is that I need to go with the 1080p equipment and I don't think that you currently stock those items and I'm in need of a solution quickly. Direct sale prices make up for the foreign shipping cost and then some. Again, Dahua is not doing US dealers any favors. I appreciate your time and effort. You have both been very helpful. Feel free to delete this thread as it does nothing to help your company in the future. Thanks again.