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Longtech > Help > Tech Support > CCTV FAQs

1. Q: What are the default password and username for Dahua products?
    A: Username: admin/888888/666666    password: admin/888888/666666


2. Q: What are the names of APPs on cellphone for Dahua product?
    A: For iphone: idmss lite
     For Andriod phone: gdmss


3. Q: How to recover password if you forget current password (Dahua)?
    A: Use RS232 port to clear up the configuration.

4. Q: How to add cameras onto Dahua NVR?
    A: Right-click mouse and choose "Remote Device", then you can find the camera-adding menu.

5. Q: How to playback?
    A: Right-click mouse and pick search function.

6. Q: Does Dahua DVR/NVR support audio-recording function?
    A: Only with external audio device.


7. Q: Does Dahua DVR/NVR support DVD burner?
    A: Some model have the function, please contact us for more details.

8. Q: How many HDD does Dahua DVR/NVR support?
    A: 1/2/4/8, it depends on model.

9. Q: What size of HDD does Dahua DVR/NVR support?
    A: 2/3/4T Mam. depends on different models.

10. Q: What is Lux?
     A: Illuminance is a measure of how much luminous flux is spread over a given area. One can think of luminous flux (measured in lumens) as a measure of the total "amount" of visible light present

11. Q: All cameras have Motion Detect function?
      A: Most analog cameras have to connect the DVR to perform Motion Detect function; Most IP cameras have this function within its build-in server

12. Q: How to remotely view cameras?
      A: Install the software provided by the manufactory (computer, smartphone, etc.)

13. Q: What is H.264?
      A: H.264 is is a standard for video compression, and is currently one of the most commonly used formats for the recording, compression, and distribution of high definition video.

14. Q: What is D1?
      A: D1: 480i format (525 i): 720 * 480 (level of 480 lines, interlaced scanning), and NTSC analog TV the same clarity, the line frequency to 15.25 kHz, the equivalent of what we call the 4 CIF (720 * 576)

15. Q: What is default IP address for Panasonic camera?

16. Q: What is default IP address for Dahua products?

17. Q: What is default IP address for TP-Link products?
      A: It depends on the products; please see the back of the products.

18. Q: What is default user name and password for Panasonic products?
      A: It depends on the model, please refer to the manual. (most of them are: admin/12345)

19. Q: What is Port Forwarding?
      A: Port forwarding allows remote computers (for example, computers on the Internet) to connect to a specific computer or service within a private local-area network (LAN).

20. Q: What is 720P?
      A: 720p is the shorthand name for a category of HDTV video modes having a resolution of 1280*720

21. Q: What is 1080P?
      A: Around 2MP

22. Q: What is video quality of Dahua NVR support?
      A: 4x1080P @ 30fps, 8x720P @ 30fps or 16xD1 @ 30fps simultaneously.

23. Q: Is there any NVR software using on PC?
      A: Yes, most of the software are not free.

24. Q: What is DDNS?
      A: Dynamic DNS or DDNS is a method of updating, in real time, a Domain Name System (DNS) to point to a   changing IP address on the Internet. This is used to provide a persistent domain name for a resource that may change location on the network.