MicroNet SP5562HSM User Manual

User Manual
Indoor Box IP Camera
Model No.: SP5562HSM
http://www.micronet.info
About This Guide
Model
z SP5562HSM Indoor Box MegaPixel IP Camera
Before Using the SP5562HSM IP Camera
9 Check PC requirement 9 Check OS platform requirement 9 Read special and important precautionary information. 9 Basic knowledge of network setup and configuration will be helpful.
Icon Descriptions
Notes: This icon represents a tip for operation.
Caution: This icon stands for an action that probably impairs the
operation.
Warning: This icon stands for an action that can cause damage to the
operation.
TABLE OF CONTENTS
ABOUT THIS GUIDE..................................................................................2
TABLE OF CONTENTS................................................................................3
1. PRODUCT OVERVIEW.........................................................................4
2. SETTING AND INSTALLATION............................................................6
3. USING SP5562HSM FOR THE FIRST TIME ..........................................8
4. ACCESS IP CAMERA .........................................................................11
5. WEB INTERFACE SETTINGS – BASIC................................................15
6. WEB INTERFACE SETTINGS - EXPERT ..............................................29
7. FACTORY DEFAULT ..........................................................................42
8. REBOOT...........................................................................................43
9. LOGOUT...........................................................................................44
10. QUICK CONFIG PORT – FIRST TIME EXPERIENCE............................45
11. TROUBLESHOOTING ........................................................................50
12. SPECIFICATION...............................................................................51
APPENDIX ..............................................................................................53
1. PRODUCT OVERVIEW
SP5562HSM supports dual streams simultaneously. Combination options include:
Stream 1 Stream 2
H.264 H.264
M-JPEG M-JPEG
MPEG-4 MPEG-4
Note: If users assign MPEG-4 for both Stream1 and 2, the image will be unable
to reach real-time performance. M-JPEG for both Stream 1 and 2 leads to the same
result. This is system limitation.
Package Checklist
¾ SP5562HSM IP Camera x 1 ¾ Power Adapter x 1 ¾ USB Cable/Mini Din cable x 1 ¾ Product CD x 1
Front side
Back side
Connectors
1. ICR Control
2. Auto Iris Control Adapter
3. USB Config Port
4. 12V DC Power
5. Mini-Din I/O Socket
6. SD Card Socket
7. USB Host for Extension Wi-Fi Support
8. Audio Line In/Out
9. Video Out BNC Connector
10. RJ-45 Ethernet Port
11. Power LED
2. SETTING AND INSTALLATION
Note:
z Connect SP5562HSM to your network by using a standard Cat-5 cable.
z Connect the video output of your camera with video in of video server, using
standard 75Ω coaxial cable with BNC type connector.
z Connect speaker and active microphone to Audio In / Out.
Product CD
Product CD in the package contains:
9 NVR management software
o 36CH Live View / Recording / 4CH Playback
9 IP Scan software 9 User’s Manual
Power on IP Camera
Use the power adapter, provided in the package, to power on the IP camera. The adapter should be connected to 110v~22Ov AC socket.
Connect to Network
Connect SP5562HSM and network hub/switch via a standard CAT5 Ethernet cable and RJ-45 socket. Please pay attention that the PC must be on the same network domain with the IP camera.
Connect I/O
Users have to make pin-to-pin correctly to enable this function.
Enable Audio Function
The video flicker may occur when enabling or disenabling audio
in and audio out. The situation normally lasts for a second.
3. USING SP5562HSM FOR THE FIRST TIME
Browser for Live Viewing and Video Settings
Microsoft IE browser version 6 or higher is recommended. Currently Mozilla Firefox and others are not compatible.
Factory Setting – Initial IP Address
Default IP Address: 192.168.1.2 Gateway: 192.168.1.1 Subnet Mask: 255.255.255.0
Network Domain
Alter the IP address of the PC to the same domain of default value (192.168.1.2). Users may alter the IP a ddress of the IP camera to the same of PC via IP Scan. Please refer to page 45 to check detailed information.
Use IP Scan
The software allows users easily and quickly find the specific IP camera on the network.
Select IP Scan from the start menu. User can see the following image:
Press Scan button to check the IP and MAC address list. Press Clear Table button and press Scan again to refresh.
You will find the list of IP and MAC address listed. To indentify your IP camera you can flip over the IP camera and check the label for MAC address on the bottom side.
Note: Please pay attention that a completed RMA form must contain the serial
number of the product. For more information, please refer to our website.
Change Network Setting via IP Scan
Double click on a specific IP address; the setting page will pop up. Users may alter some basic network parameters in this page.
Press Scan to automatically find online IP Camera on the
network domain
Be sure to press APPLY to enable the new setting
Within 10 seconds, the dialog box would disappear . This indicates that the new settings are deployed. After typing in the new IP address, user may close the setting page and wait for 45 se conds. It takes 45 seconds to restart the system. After rebooting, user may press Scan to check the new IP address.
Note: “DOUBLE Right Click Function” Æ Double right click on a specific IP
address on the list; user can quickly open the live viewing browser page.
Press Exit to quit.
Double click
4. ACCESS IP CAMERA
Browser
¾ Open an IE browser ¾ Type in the IP address of video server that you found via IP Scan. For
example: 192.168.1.2 (default IP address)
¾ A popup login dialog box will automatically display. ¾ Initial username and password (case-sensitive):
Login: root Password: pass
Press OK button to access to the live viewing web page.
Initial Username & Password
Æ Administrator
¾ Default ID / Password = root / pass ¾ The ID of administrator can not be changed or deleted; only the
password is changeable.
¾ Administrator has the authority to view and control system settings.
After logging in with root / pass as administrator, user may see the live viewing page.
1. There is a toggle button on the top right corner of the live viewing
page.
2. User may press this button to switch web configuration page to the
live viewing page and vice versa.
3. Control options are listed on the right side.
4. OSD is displayed on top left corner of the screen.
The sequence is date (mm-dd-yyyy), time, and camera name.
(camera name is optionally displayed
Control Panel Settings
1. Video / Resolution
The following table shows common resolution format values:
2. Video rates / Bit rates
3. Choose a specific value and the setting will be enabled within few
seconds. The image on the screen might briefly pause.
4. Camera information (Please refer to the picture)
The button is on the lower right corner of the living viewing image, showing video information such as frame rate (fps), model name, and resolution.
5. Digital ZOOM
Enable digital room will resize full view window to VGA resolution, at such condition, user can move zoom icon to desired area and click right mouse bottom, image will automatically perform 2X zoom ratio; when digital zoom is enabled, user can run ePTZ (electrical Pan/Tilt/Zoom) function with arrow icon at the edge of image window
Resolution SXVGA VGA QVGA QQVGA NTSC
1280x1024 640x480 720X480
6. Digital Output (Please refer to the picture)
T o enable this function, user has to connect the PIN via the Mini DIN cable. The toggle button works as a switch to enable/disenable Digital Out function.
- Blue line : RS485 +
- Yellow line : DI +
- Black line : DI -
- Green line : RS485 -
- Bro wn line : DO +
- Red line : DO –
FPS Name Resolution
5. WEB INTERFACE SETTINGS – BASIC
SP5562HSM / SP5562HSM built -in web interface provi des the access to further settings. Enable the top-right side icon in the live viewing page to access to the further settings. This button also works as a switch between configuration and live viewing page. (Please refer to the picture in p.16)
Status
1. Status is the first item of the setting options.
2. This page shows the IP address, MAC address of the video server,
hardware, firmware information, and other related information.
Network
There are three available types of wired network connection: STATIC, DYNAMIC and, PPPoE.
Æ Static IP
1. IP Address Please confirm with the network administrator.
2. Subnet Mask / Gateway / Default DNS
Please confirm with the network administrator.
3. Be sure to press “OK
” to save the new setting.
4. Reboot will be required and automatically triggered after pressing OK.
Please wait for a moment to the count down timer stop. The page will be redirected to the initial login one.
Note: Always use IP Scan™ to find the MAC addresses after reboot and double
check the IP address. Make sure the IP address is correct. If IP was changed in web
configuration, you cannot return to initial login page after reboot.
Æ Dynamic IP
1. If DHCP server is on LAN and you want to allocate Dynamic IP address,
use DHCP.
2. Press “OK” button.
3. Reboot will be required and automatically triggered after pressing OK.
4. Please wait for a moment to the count down timer stop. The page will be
redirected to the initial login one.
Note: Always use IP Scan to find the MAC addresses after reboot and double
check the IP address. Make sure the IP address is correct. If IP was changed in web
configuration, you cannot return to initial login page after reboot.
Æ PPPoE Settings
1. If the network supports PPPoE like xDSL, this option is available.
2. Require ISP (Internet Service Provider) to provide ID/Password.
3. User ID / Password
4. PPPoE user ID / Password
5. Service Name: Service name of ISP
6. MTU
Maximum transmission unit of data
7. IP address of DNS sever can be set to be automatically created.
8. If xDSL does not use static IP, you should use DHCP.
Caution: Be sure press “OK” after you have changed the setting in a
particular setting page. After few seconds, a confirmation dialog box will pop up to
indicate that the setting has been updated. To return to the same page, please press
“OK”.
Video
Stream 1
Æ Video Settings
1. Stream Port: Stream 1 port value setting
2. Stream Protocol: Selectable options: TCP/UDP (RTP) / User can decide
whether to enable multicast function or not (If UDP is selected).
3. Video Compression Type: Selectable options : H264/M-JEPG / MPEG-4
4. Resolution: Selectable Options: VGA/QVGA /QQVGA
5. Bit rate Type: There are two selectable options: constant bit rates (CBR)
and variable bit rates (VBR), providing the flexibility in choosing bandwidth.
6. Constant bit rates (CBR): 4M / 3M / 2M / 1.5M / 1M / 750K / 500K / 384K
/ 256K / 128K / 64K
Note: 1M is recommended when using H.264; 1.5M is recommended when
using MPEG-4.
Note: When mosaic or fragment occurs in the image, users may lower the
frame rate or assign another level of image quality.
7. Variable bit rates (VBR) ranges: 15 ~ 51 (The value “3” is default.)
8. Frame per second: 1 / 5 / 10 / 15 / 20 / 25 / 30
9. Group Size GOP: This function is designed for adjusting the ratio
between “I” frame and “P” frame. Lower the group size represents the lower bandwidth consumption.
10.Video Type: NTSC / PAL
Note: System can automatically detect the input video signal when the
detect icon clicked.
Æ Max Client
This function allows more than one user to have the access to the video stream. The relationship between bit rates, resolution, and the client amount is an inverse ratio.
Maximum number of clients depends on the available network bandwidth and the required video quality. The available range is 0 ~ 10.
Stream 2
Caution: You have to enable Stream 2 in this section to see the option on the
control panel setting page.
The setting in stream 1 and 2 are the same. ; Administrator can decide whether to enable this stream or not and see the live video in “Live Viewing” page.
Æ Color Settings
Users may make some fine adjustments to the video quality. The following is the instruction:
1. BRIGHTNESS: Adjust the brightness of the image.
2. CONTRAST: Adjust the
variation in the intensity of an image.
3. SATURATION: Adjust the intensity of color in the image.
4. HUE: Adjust the gradation or variety of a color.
5. AEC: Adjust the auto exposure control of the image.
6. AGC: Adjust the auto gain control.
7. AWB: Adjust the auto white or black of the image.
8. Mirror: Adjust the left or right side of the image opposite.
9. Night mode: There are three modes to select. (ON/OFF/AUTO)
10. Black/White mode: AUTO or OFF selection.
Æ Video Preview
This function makes user easily check the possible change of altering parameters of setting. By pressing the View Video button, you can se e the following
Press Stop to exit preview mode. Y ou could alter other parameters and press TEST to see the expected video image. In the process, u ser can press Reset anytime to return to the default settings. Press Enable Preview to save the current setting – the new settings will be enabled immediately.
Caution: Do not forget to press “OK” button to save the current settings.
Event Rule
SP5562HSM/SP5562HSM is capable of handling all basic and standard events.
Æ Events handled by SP5562HSM
1. Digital Input
2. Motion Detection
3. Periodic Timer
4. Network Loss
5. Video Loss
6. Power Loss
Æ Actions supported by SP5562HSM
1. Digital Output
2. PTZ preset
3. E-mail Notification
4. Record
Æ Events Handled
1. Digital Input: Two options: “Normal Open” (N.O.) or “Normal Close”
(N.C.)
2. Motion Detection: If a motion is detected in the defined areas, an event
will be triggered.
3. Periodic Timer: An event will be triggered following the schedule of the
pre-defined time interval. For example, if the time interval is set 60-second, the event will be triggered once per 60-second.
4. Network Loss: When network loss is detected, an event will be triggered.
5. Video Loss: When video loss is detected, an event will be triggered.
6. Power Loss: When system power loss is detected, and event will be
triggered. The e-mail notification which indicates the time interval of power loss will be made as powering on.
Æ Actions Triggered
1. Digital Output: Activate digital output.
2. PTZ Preset: PTZ set to a particular preset value can be triggered based on
occurrence of an event listed out in “Rule Lists
”.
3. E-mail Notification: E-mail can be sent based on occurrence of an event
listed out in “Rule Lists
”.
4. Record: When event triggered, system will record streaming to FTP
Server.
Æ Rule Lists – Adding / Deleting
Select an event and choose its corresponding actions. Press add button and notice that is added in the Rule lists
Information box.
Æ Modifying Rule Lists
User may press Delete All to delete the items of event rules.
Date & Time
1. Press the “Client PC time” check box, Date and time setting can be
synchronized with PC directly. Press “OK
” after you have the setting
done.
2. Time zone can be chosen from the two listed time servers.
3. After selecting, the time server can be set to synchronize the time of
video server.
Press “OK” after you have changed settings.
4. If you want to manually input time server, choose “Other” then you can
find a manually input edit box. Key in your preferred time server and press “OK
”.
OSD
Note: The OSD and Camera Info. Displays are independent.
If “Enable” checkbox is checked, the channel name will be shown on OSD. If not, this information will be shown on the Camera Info. only.
6. WEB INTERFACE SETTINGS ­EXPERT
Port
Caution: The default port value is 80. Users may change the value. Please pay
attention that if the port is changed (e.g. 80) users have to put: 80 in the end of the
IP address.
The value of WEB and AV port can be changed.
1. Web: The default value of Web Port is 80.
2. Configuration Port: The default port is 1150. (Contacting with your
NVR vendor to check this feature is recommended.)
DDNS
The function is used to map an IP address with the host name. If the IP camera is set a dynamic IP address, the host name must be provided by DDNS (Dynamic Domain Name Service).
Æ IPv4 DDNS
¾ Check “Enable” and select one from the two options. ¾ Registrations on DDNS service sites are required for the two
options.
¾ Please go to dyndns.org for registration and further information.
SMTP/FTP
Video Server / Full Function of Video Server support e-mail notification & FTP upload
Æ E-mail – SMTP Setting
Enter the port number, user name, password, and server name information of the SMTP server. If you’d like to receive the attached snapshots, please enable the appropriate check box. Authentication is not a mandatory requirement by SMTP servers. In some situations, the required information includes the SMTP server name and e-mail address only.
Note: Users may define the following parameters.
Æ FTP Setting
Please fill in the address of remote FTP server, port number, user name, and password.
Caution: Users may assign the port value (e.g.30). Please pay attention that
if the port is changed (e.g.80), users have to put: 80 in the end of the IP address to
facilitate the operation.
Trigger Setup
Caution: The anode of Mini DIN has to be connected to the anode of the
device to facilitate the operation. So does the cathode.
Three different types of EVENT can be triggered
Æ Digital Input (DI)
There are two selectable options: Normal Open (N.O.) and Normal Close (N.C.)
Users may choose the proper option depending on the input type. Be sure to press “OK” to save the setting.
Æ Periodic Timer
Timer interval can be set in terms of seconds. An event will be triggered according to the schedule.
Æ Motion Detection
Type
a. There are two selectable options: “always ” and “schedule” mode. b. Users can define the schedule as assigning “schedule”.
Detection Area: Check the check box to enable Motion Detection; administrator can self-configure 1~3 detection areas. Click area enable check box and draw icon, then draw desired area within top preview window; draw area will be changed into a specific color.
Sensitivity value: Defines the sensitivity of motion detection. The range of the value is -10 to 10.
*Note: Lower sensitivity value, higher sensitivity level
Æ Video Loss
Users may assign the time interval of the event trigger after video loss.
Pre/Post Setting
This function is designed for setting the stream format type and time
duration of Pre/Post buffer.
Format options include “A VI” for video file) and “JPEG ”(for picture file).
There are three modes to record to option: “FTP Upload”, “Local SD Card”
and “NAS storage” selectable.
SD Card
The high capacity SD memory card can be used for local recording
with removable storage.
NAS Setting
Account
Administrator can create new user accounts. Login as the administrator and create user accounts by clicking on “Add”. Administrator can assign different combinations of authorities for each user account. The options
include video settings, and digital out. Administrator may alter the combination of authorities anytime.
There are limits to the length of user’s name and password. If the length exceeds the limit, a dialog box will pop out for notification. Guest permissions can be turned ON/OFF by each individual account.
The account name” root” of administrator can not be changed or deleted. Only the password is changeable. Confirmation will be requested as changing the password.
Æ Account Limitations
Administrator can add up to 5 users and assign different authorities to each individual account.
Æ Guest Permissions
Guest account can be turned ON/OFF anytime.
Security
The default setting of security is LOW.
1. Definition of Each Security Level
a. HIGH: ONLY LAN connections are permitted. b. MEDIUM: Video and audio connections from any location and
settings from LAN are permitted.
c. LOW: All connections from any location are permitted.
2. Power LED
a. Turn On: As the default setting, power LED will always be on during
the operation.
b. Turn Off: Config power LED as off during operation.
Maintenance
Æ Language
¾ The default setting is English. ¾ Language options include: Traditional Chinese and English.
Æ Firmware Update
Warning: The power supply must be steady as upgrading the firmware. The
power failure during the upgrade process results in serious damage
to the machine.
Users can download the firmware file from Micronet official website. Choose the specific one and press upload. When uploading is finished, reboot will be requested and automatically triggered.
Æ System Configuration (Backup / Restore)
Yo u can backup the current configuration setting and save it as a file.
7. FACTORY DEFAULT
While the confirmation dialog box appearing, press OK button to load default setting and do reboot. You will see the countdown timer running. The login page will appear as finishing. Please login with root/pass.
8. REBOOT
Press Reboot and one dialog box will pop up. Press OK on the dialog box; the reboot countdown timer will start running. After finishing, the login page will appear. Please login with the correct account name and password.
9. LOGOUT
Press logout to return to the login page. The login page should appear within few seconds.
10. QUICK CONFIG PORT –
FIRST TIME EXPERIENCE
QuickLink is designed for quick configuration or factory default. There is QuickLink config port, a special USB port, on each product of Micronet.
Connect the IP camera and PC via mini USB cable through QuickLink config port. Please pay attention that if the IP camera is powered on, QuickLink will not be operant. After finishing the configuration or factory default, please unplug the USB cable.
NOTE: Remove USB CABLE when the quick configuration is completed.
OS Requirement
Capability of auto/manually run of Quick Config application depends on the OS of PC.
1. Windows XP (all editions) - aut o run.
2. Windows 2000 (all editions) – manually run is required.
Unplug USB cable
3. Windows 98 (SE) – manually run is required.
Note: (Generic USB mass storage class driver (Microsoft) will be
requested –if you plan to use QuickLink based device recovery on Windows 98,
please prepare one in advance)
NO Software installation Required
There is no requirement of installation or setup of any software on Windows XP/2000 platforms.
Steps for Using QuickLink Config Port (Windows XP OS)
1. Unplug the power cable from the IP camera.
2. Connect QuickLink and PC via the mini USB cable.
3. After 5 ~ 10 seconds, the “Disk drive
” will be detected. The
detecting speed is determined by the processing speed of your PC.
4. A POP-UP dialog indicates “Config Wizard” being ready to run. Please press OK.
5. Double click on the Config Wizard. You will see the following page:
The password is required. If you didn’t change the default password, please type in pass
. Then press the login button. The
following dialog box will pop up if you don’ t type in the proper
password.
If you’d like to setup DDNS, please fill in the required information.
Return to Network page to set other network setting. Please press next to go to detailed configuration setting page. The following page is an example
of STATIC network configuration page.
After pressing next, the setting will be saved. You can press finish or continue to do other setting.
11. TROUBLESHOOTING
What If Quickconfig does not Auto run?
In some situations, Quick Config application may not auto run after connecting to QuickLink via the mini USB cable.
In that situation, you may open the disk drive page (the following is the example image). The icon should appear.
Open the folder named “autorun” . This folder contains a HTML executable file named “autorun”. Double click the file to enable the operation. You will find that it is the same “Quick Config” application is running. See the screenshots below to find that file on the disk drive.
12. Specification
Model SP5562HSM
Sensor 1/3" Megapixel Progressive Scan CMOS
Lens Mounted CS Mount Type
No. of Effective Pixels
(HxV)
1080 x 1024
Auto Iris DC Drive
Electronic Shutter 1/5~1/2000 sec (60Hz); 1/5~1/2000 sec (50Hz)
Frequency 50/60 Hz Switchable
Lens/Sensor
Gain Auto Gain Control On/Off Switchable
Scanning System N/A
Sync System N/A
Resolution N/A
S/N Ratio N/A
Analog Video Output
Mini. Illumination 1.0 Lux @ F1.2
CPU ARM 9
SD RAM 128MB
Flash 16MB
System
OS Linux 2.6
Format
M-JPEG, MPEG-4, H.264 Dual Stream
Simultaneously
Frame Rate
15fps @ SXGA (1080 x 1024) ; 30fps @ VGA
(640x480)
Video Resolution
SXGA (1080 x 1024), VGA (640X480), QVGA
(320X240), QQVGA (160X120)
Bit Rate
M-JPEG: 5 Video Quality Level Selectable
MPEG-4/H.264 : 64K~4Mbps
Video Output
1CH NTSC/PAL, BNC Connector, 1.0Vp-P with
75 Ω Loading
Compression
Audio In / Out: ADPCM
Ethernet RJ45 10/100 Base-T
IP Network
Protocol
TCP/IP, DHCP, PPPoE, HTTP, DDNS, NTP, FTP,
SMTP, UDP, RTP, RTSP, 3GPP, UPnP
I/O Connector Iris Control DC Drive
I/O Digital In, Digital Out, RS-485
SD Card Socket Yes
USB Port Mini-USB for Quick Configuration Tool
USB A Type External Wi-Fi Dongle
Audio 3.5 mm Jack x 2 (In x 1 / Out x 1)
Power Supply 12V DC/ 1A
Dimension 76.3(W) x 64(H) x 100(D)mm
Weight 350g
Mechanical
PoE (IEEE 802.3af) Yes
CPU Pentium 4, 2.4GHz or Above
Hard Disk 80GB or Above
Memory 512MB or Above
OS Windows 2000, XP, Vista
Video Resolution SVGA or XGA with 1024 x 768 Resolution
System Requirement
Software DirectX 9.0C or Above
Configuration Scan Utility
Integration SDK for Windows, Linux, CGI
Web Browser Microsoft Internet Explorer 6.0 or Above
Management/Support
Security Password Protection
Temperature 0°C ~ 40°C (32°F ~104°F) Operating
Environment
Humidity 20% ~ 80% RH
Accessories Power Adapter, USB Cable, CD-ROM (User Manual, Free Bundle NVR)
Appendix
A
ActiveX ActiveX is Microsoft software component technology, mainly used by Microsoft Windows. They facilitate sharing of information between differing applications. Digital video recorders utilize ActiveX to remotely view security cameras online.
AGC (Automatic Gain Control) AGC increases the signal strength of security cameras when the light level decreases, and puts a cap on it during higher levels; this keeps the output signal consistent.
AI (Auto Iris) A useful feature to have in a video camera, an auto iris compensates for variations in light levels, from sunlight to shadows. Essentially , the auto iris opens and closes the lens iris as the light changes; this also prevents the camera from being damaged by very bright sunlight.
Alarm Input When attached to a security camera, an alarm input provides enhanced security in the form of a sensor device, often a door contact or a Passive Infra-red detector for motion detection. Alarm inputs can be self powered or can require external power (usually 12V).
Analog Signal Analog signals are produced by most security cameras. Analog signals are continuously variable, and are greatly affected by ‘noise’ (disturbances) within the system, and recordings of analog information (such as videotapes) degrade over time. This doesn’t occur with digital signals recorded on media like CDs, DVDs and computer hard drives.
Angle of view Also known as viewing angle, this refers to the angular range available
within a certain image size. The smaller the focal length, the wider the angle of view is.
Aspect Ratio Aspect Ratio refers to the ratio between an image’s height and width. Differing mediums such as television, HDTV, and film, use different aspect ratios. Within computer graphics, it refers to the shape of an individual pixel in a digital image.
Automatic White Balance Cameras with this feature installed will automatically adjust color settings to achieve consistent quality in the white areas of the image.
B
Bandwidth Measured in bps, Bandwidth refers to a telecommunications link’s transmission capacity. The bandwidth available in a connection plays a large role in the speed of an Internet connection.
BLC (Back Light Compensation) Cameras with this feature will automatically bring more detail to darker areas of an image when bright lights (usually shining from behind) obscure it.
BNC connector These are a type of RF connectors that interconnect two coaxial cables or connect a cable with CCTV components. They’re used in Ethernet networks, video connections, network cards, and cable interconnections.
bps (Bits Per Second) This unit is used to measure the speed data is moved between sources. For example, a 56kbps modem can move 56,000 bits per second.
Byte A unit of eight bits is known as a Byte.
Bitrate
The bit rate (in kbit/s or Mbit/s) is often referred to as speed, but actually defines the number of bits/time unit and not distance/time unit.
C
CCD (Charge Coupled Device) This is a computer chip that converts the light energy that enters a camera into an electrical charge, which is then converted into an electronic image. The image is then optimized into a very high quality picture. There are two types of CCD: frame transfer and interline transfer.
CCTV (Closed Circuit Television) CCTV refers to the use of television cameras for surveillance purposes. Unlike broadcast television, all devices are linked directly, usually by cables. CCTV pictures are viewed and/or recorded, but are not broadcast. Usually involving analog cameras and recorders, CCTV is the precursor to digital network systems.
CIF (Common Intermediate Format) The default frame resolution of 352x288 for DVR systems is known as the CIF.
CMOS The use of Complementary Metal-Oxide Semiconductors in imagers to sense images improves over CCD technology in resolution, dynamic range, and noise sensitivity.
CS-Mount This is a specific type of camera, as well as its corresponding lens mount. The CS-mount lens has a flange back distance of 12.5mm.
Coaxial Cable A cable with a central conductor that’s surrounded by a shield sharing its same axis is called a coaxial cable. It’s used primarily for carrying high frequency or broadband signals. RG59 video coaxial cable is used for digital video recorder (DVR) installations.
CODEC CODEC means compressor/decompressor and is any technology used to compress and decompress data. It converts analogue input into digital, and
then converts it back to analogue. CODECS can be either software applications or hardware components, or both. DVRs use CODECS to compress video streams from security cameras, and then store this compressed data on a hard disk.
CGI
The Common Gateway Interface (CGI) is a standard for interfacing external applications with information servers, such as HTTP or Web servers. A CGI program can be written in any language that allows it to be executed on the system, such as: C/C++, PERL, Visual Basic etc.
Compression
It is a process of reducing the size of digital signal.
D
D1 D1 is a resolution of 720x486 (NTSC) or 720x576 (PAL), and was one of Sony’s first digitized videotape formats.
dB (Decibel) A decibel is a logarithmic unit that measures the loudness, power, or strength of a signal.
DHCP (Dynamic Host Configuration Protocol) A DHCP refers to the protocol used by a host computer to obtain an IP address so that it can communicate with other host computers. These addresses are usually dynamic, meaning they change periodically, so a connection cannot be obtained (or maintained) over the open Internet. Use of both static IP addresses and dynamic DNS helps establish a consistent connection.
DNS (Domain Name Service) DNS is the system that matches server IP addresses to web site domain names.
DSP (Digital Signal Processing) These chips can compress video independent of the CPU, which avoids the need to draw processing power from the CPU, allowing it to focus on other applications and computing tasks.
Dynamic IP address This is the rotation of IP addresses such that every time a user logs onto the Internet, their IP address changes. This is done for Internet security purposes, either by the user or by their ISP. This process can interfere with the use of networked devices such as Network IP Cameras because they normally require a static IP address to function properly.
E
Electronic Shuttering This term applies to video cameras that compensate for moderate indoor changes in light without use of auto iris lenses.
E-mail notification This is a feature of certain motion detecting Network IP Cameras. When activity is detected, they can email authorized users images or video. Griffid is one example of camera management software that accomplishes this.
Embedded operating system Cameras with this can also operate as computers. With an OS like Linux installed, they can perform other tasks such as sending images to a web site via FTP, email notification, and being simultaneously accessible by multiple users.
Ethernet Ethernet can send information either wirelessly (known as WiFi) or, more commonly, over wires. It runs at 10mbps, and all terminals connect to a single common bus (sometimes called a highway). It serves as the IEEE (Institute of Electrical and Electronics Engineers) 802.3 standard, which ensures that networks adhere to a particular set of technical standards. A new type, known as Fast Ethernet, or 100Base-T, runs at 100Mbps, and the newest type, Gigabit Ethernet, runs at 1gigabit per second.
F
FCC (Federal Communications Commission) This United States commission regulates communications by setting rates, controlling broadcast licensing, and testing electronic equipment to RF (radio frequency) transmission and related standards.
Firewall A firewall is a software or hardware application installed on a home or office computer that is intended to prevent unauthorized users from accessing that computer. With hacking and network intrusions on the rise, they are becoming essential in protecting private information. Four popular types of firewall are packet filtering, application gateways, circuit-level gateways, and proxy servers. Although they can be difficult to configure correctly, they are a critical component to protect unauthorized access and hacking of IP based surveillance systems that are LAN based.
Focal Length Focal length is measured in mm or inches, and is the distance between the optical center of the lens and the point on which it focuses. A lower focal length results in less magnification with a greater field of view, and vice versa for longer focal lengths. Security cameras usually have a focal length of ¼”, 1/3”, or ½”.
fps (Frames Per Second) In the field of video surveillance, fps means the number of frames an IP camera is able to capture per second. Three steps are required: video capture, compression, and storage. Each step affects a camera’s true fps number. The use of DSP chips in the camera can assist in the optimization of fps.
Frame One complete picture is called a frame, and it contains 525 lines (NTSC) or 625 lines (PAL).
FTP (File Transfer Protocol) FTP is a client/server protocol used for the exchange of data between
computers. Network cameras with an embedded operating system use FTP to send camera images to an authorized user’s computer or web site.
G
GUI (Graphical User Interface) Pronounced ‘gooey’, this is the interface between the computer and the matrix switcher. Active areas of the computer screen are programmable, feature menus, icons, are clickable, and able to activate devices such as VCRs and matrix switchers. Essentially, the GUI makes the CCTV system easier to use.
Gain
Gain is the amplification factor and the extent to which an analog amplifier boosts the strength of a signal. Amplification factors are usually expressed in terms of power. The decibel(dB) is the most common way of quantifying the gain of an amplifier.
Gateway
The hardware and software needed to connect two disparate network environments.
GIF Graphics Interchange Format
GIF is one of the most common file formats used for images in web pages. There are two versions of the format, 87a and 89a. Version 89a supports animations, i.e. a short sequence of images within a single GIF file. A GIF89a can also be specified for interlaced presentation.
GOV
Group of VOPs- A group of VOP’s is the basic unit of an MPEG-4 video stream. The GOV contains different types and members of VOP’s (I-VOP’s, P-VOP’s, etc.) as determined by the GOV length and GOV structure.
H
Horizontal resolution This measures the maximum amount of individual picture elements recognizable in a single scanning line.
HTML (HyperText Markup Language) HTML is the language used in the creation of WWW pages, with use of hyperlinks and markup for text formatting.
HTTP (HyperText Transfer Protocol) This is the protocol utilized to transmit and request information from WWW servers to browsers, either online or over networks.
Hub Networks rely on devices called hubs to connect multiple computers together into a LAN. Standard hubs share the bandwidth across all ports (so an eight port 100 Mps hub allocates this 100 Mps among the eight ports), while switching hubs are able to give each individual port a dedicated bandwidth amount (so these same eight ports could conceivably each receive a full 100 Mps of bandwidth on a switching hub).
I
I Frame An I Frame is a complete image frame (known as an Intra Frame) in MPEG encoding that is coded wit hout referenc e to other p ictures. Compression is achieved by reducing spatial redundancy in the image, but not temporal redundancy.
Infrared illuminator A light source working in the infrared frequency range is called an infrared illuminator.
Interlaced This refers to a type of display where the electron beams alternate between scanning the even numbered lines and then the odd numbered lines, resulting in the two vertical scans on the screen, with the field (each set of lines) being updates 60 times a second, and with the frame (both fields) updated 30 times a second.
IP (Internet Protocol) This is the protocol used to route a packet of data from source to destination over the Internet. Every computer on the Internet has a different IP address that identifies it from other computers.
IP address This is a numeric address that is then translated into a domain name by the DNS (domain name server). When we type in a website’s name, the computer translates this into its IP address, which is a unique 32-bit number. The TCP/IP protocol then uses it for routing the data packets to their destinations. Each host has a unique IP address.
IP Camera (or Network Camera) This signal from an IP camera is delivered over an IP network. The camera digitizes the images, compresses them, and then sends them over the network (if this sounds similar to a webcam, that’s because there is digital webcam technology contained within a network camera). But a typical IP network camera is much more advanced as compared to a consumer web camera which needs to be attached to a computer to operate. IP enabled security cameras usually offer a browser interface so that the user can operate and view the video remotely over the Internet. A DVR system is often comprised of an IP camera and a NVR.
Iris The section of the lens adjusted to control how much light passes through it and onto the CCD chip is called an iris.
IEEE
Institute of Electronics Engineers Inc. is an international organization that sets standard for various electrical and electronic issues.
ISP
Internet Service Provider is a company that provides direct access to the Internet for home or business users.
J
Joystick PTZ controllers utilize this stick as a control device for pan and tilt movement of a PTZ security camera’s pan and tilt head.
JPEG (Joint Photographic Experts Group) This is one of the most common file formats for compressed photo images. A small amount of data, though not noticeable enough to be significant, is lost in the compression process, making JPEGs a lossy compression algorithm.
Java
A programming language developed by Sun Microsystems which can run on any platform which has a Java Virtual Machine installed.
K L
LAN (Local Area Network) A LAN is a high-speed network connecting computers that are nearby (probably in the same building), and offers differing connection protocol options.
LED (Light Emitting Device) Monochrome surveillance cameras use LEDs to provide infrared light. An LED creates an infrared light frequency when stimulated by an electric charge.
Lens This is the device responsibl e for fo cusi ng the imag e on th e CCD, and most offer adjustable focal length and aperture.
Linux Linux is an open source UNIX implementation, and a popular alternative to the Windows operating system. It is often used in embedded operating systems found in advanced Network IP Cameras. Linux is freeware.
Lux Used more often than lumens when discussing security cameras, a lux is a unit of illumination. It measures the amount of uniform light that falls on one
square meter (expressed in one lumen per square meter). Security camera specs use the lux to indicate how much light they require to operate, with lower lux levels indicating a camera as more effective in lower ambient light. Look for 0.2 lux or less when choosing a low-light camera, and 2 lux or higher for daylight cameras.
M
MJPEG (Motion JPEG) ­Even though it’s not as efficient as MPEG-4, the MJPEG is still an effective way of creating video from the sequencing of JPEG images. The video from store security cameras often uses this method when being formatted.
Motion Detectors These devices are used to detect motion on security cameras. Simple motion detection triggers the camera to either record or set an alarm. Motion detection by frame region instructs the camera to respond only if a certain area of the screen/frame detects motion. Finally, adv anced motion detection analyzes the type of motion to see if it warrants alarm (such as crossing into a secure area). One benefit of motion detectors is that cameras only record when motion has been sensed, which saves disk space.
MPEG (Moving Picture Experts Group) ­One of the most common coding standards for internet transferable video images, the MPEG format is playable on nearly all free and payware video players. MPEGs use lossy data compression. MPEGs first predict the initial picture content, and then code differences between that and the copy, as well as any extra information.
MPEG-4 MPEG4 has a newer codec and supports 3D content, low bit rate encoding, and support for Digital Rights Management, which controls the use of copyrighted digital work. MPEG4 is used for web streaming media, broadcast television, videophones, and CD distribution. MPEG-4 is widely used in video surveillance, and has recently been improved to the AVC standard.
Multicast (or Multicasting) This term refers to the Internet protocol that allows a single IP address (the host) to send a packet to multiple destinations at once with a single, local
transmit operation. It also is used in video streaming to enable the broadcasting of video to multiple recipients at once.
Multiplexer A video surveillance device with multiple video inputs and one video output is called a multiplexer. Multiple security cameras are connected to it and their images can be presented on one monitor. A front panel displays the buttons that toggle each camera, and the signal from one camera or a combination thereof can be displayed. Multiplexers are simpler to use as compared with similar procedures on a DVR which normally requires a system login, operating a keyboard and controlling a mouse.
MAC MAC address
Media Access Control is a part of the network interface card NIC that controls the way multiple devices use the same media channel.
Manual iris
This is the opposite to an autoiris, i.e. the camera iris must be adjusted manually to regulate the amount of light allowed to reach the image sensor.
Mbit/s
Megapixel
A pixel is one of the many tiny dots that make up a digital image. The color and intensity of each pixel represents a tiny area of the complete image. Megapixel is mega pixels.
N
Network Camera Also known as a Network IP Camera, this is a stand-alone camera that uses a standard web-browser to view live, full motion video from a computer network, including over the Internet. They often feature an embedded OS (operating system) and features like: FTP of images, web server capability , and built-in motion detection.
NTSC (National Television Standards Committee) The NTSC represents the American and Japanese standard television video signal format of 525 picture lines and a 60Hz field frequency.
NVR (Network Video Recorder) Functionally similar to a DVR, a NVR also accepts IP camera inputs. NVRs can be software based, making them suitable only for accepting IP camera streams over the Internet.
O
Outdoor Camera Housing A protective shell for security cameras to be placed in outdoor environmental conditions, these housings typically include cooling fans for summer use and heaters for winter use. The heaters also eliminate fogging of the glass anytime this occurs.
P
PAL (Phase Alternating Line) Europe’s television video signal standard is known as PAL. PAL uses 625 picture lines and a 50Hz field frequency , and is incompatible with NTSC.
Pelco-D This Pelco created protocol is used to control PTZ security camera movement.
Pixel (Picture Element) Pixels are the smallest possible display unit of visual information available for building a graphical image. It is also the basic unit of a CCD chip, with most CCD chips being comprised of over 300,000 pixels.
PoE (Power over Ethernet) This abbreviation refers to a method of supplying power to an IP camera using Category 5 Ethernet cables over a physically wired LAN network.
Power supply Most security cameras utilize 24V AC or 12V DC power supplies. A power
supply is usually plugged into a regular electrical outlet or part of a centralized power supply.
PPP (Point-to-Point Protocol) Point-to-point Protocol is the primary method used in establishing a direct connection between two devices on a network (usually a computer and the Internet). It is a communication protocol between computers using one of several methods: usually TCP/IP, telephone lines, or ISDN.
Progressive Since it scans all lines onscreen at once, 60 times per second, this type of scanning is used by computer monitors to minimize flickering. It is also better able to show movement, offering more detail and less ghosting than interlaced scanning.
Protocol Protocols are standard procedures used for regulating data transmission between computers. Protocols exist to minimize errors during the exchange of data.
PTZ Camera PTZ stands for Pan, Tilt, and Zoom. These cameras are usually remotely controlled by software or a joystick. PTZ cameras are used when active real time monitoring with the ability to point the camera’s viewing area to a specific action or event is desired.
PTZ controller The controller used to control PTZ camer a movement, usually software or a joystick.
Ping
A TCP/IP utility used to test whether another host is reachable.
Q
QCIF This resolution is one quarter of CIF, with 144 lines and 176 pixels per line.
Quad Utilizing digital video, this piece of equipment displays signals from four surveillance cameras on one monitor.
R
Real time video Any picture having 24 or more frames per second appears continuous, or in real time.
Remote monitoring This allows an off site user to monitor surveillance camera feeds, so a user can survey a site regardless of their location from it. The transfer of data from camera to user can be either over the Internet or the Ethernet, with IP cameras being suited to the task.
RGB (Red Green Blue) These are the three primary colors of light. All other colors are derived from their mixture.
ROI (Region of Interest) Applied to the field of video surveillance, ROI stands for Region of Interest, meaning an area of the frame where motion is detected, in turn activating the surveillance camera.
Router A router is a piece of equipment facilitating the exchange of packets throughout LAN or WAN networks. It moves packets across a predetermined path to their destination by storing and forwarding the packets, and then determining their optimal path along the network. A router is hardware based, but can also include software.
RS232 (or RS-232) This is the communication standard that applies to PC serial communications. RS232 is commonly used as the mechanism for sending instructions that control PTZ security camera movement.
RTP (Real-time Transport Protocol) The Internet Engineering T ask F orce (IETF) developed RTPs to specify audio and video signal management. It standardizes the packet formatting for
both for easy synchronization and Internet delivery. Streaming media systems and video conferencing systems use RTP, while DVR systems rely on this protocol in the implementation of the remote view feature. Since it doesn’t specify how video surveillance playback is implemented, the data from different RTP based surveillance systems usually cannot interoperate.
RTSP (Real Time Streaming Protocol) This open standard for Internet streaming of audio and video is popular among DVR makers for remote viewing of live or stored security camera video over the Internet. RTSP controls the transmission of the data stream much the way a television remote controls the television. Like RTP, interoperability problems exist between different DVR systems.
RAID
Redundant array of independent disks is a configuration of multiple hard disks which provide fault tolerance incase one of them fail.
RAM
Random Access Memory. Electronic chips known as memory that can store digital information when power is applied to it. Its capacity is measured in kilobytes (KB).
Resolution
Resolution is a measure of picture definition and clarity and is represented by number of pixels. Higher number of pixels = Higher resolution.
RJ45
It is a connection mechanism that allows up to eight wires (or four pairs) to be connected to the network
S
Scanning Applied to the field of video surveillance, scanning is the panning of a camera across the horizontal field of view.
CCTV The traditional CCTV camera is a multipurpose device capable of numerous configurations and superb quality. They usually don’t include a lens, mount, or enclosure. They also can be expensive to configure in comparison to cameras designed for a specific purpose.
Sensitivity of a surveillance camera This term refers to the minimum level of light the CCD chip needs to generate an acceptable video picture, and is measured in lux.
Shutter speed This is the speed which the CCD chip can read out the charge. Using either dipswitches or a surveillance camera’s menu (if one has been built in), the default setting of 1/50 sec (PAL) or 1/60 sec (NTSC) can be increased up to 1/100,000.
SMTP (Simple Mail Transfer Protocol) This is the standard server-to-server protocol for the delivery of electronic mail, either via Internet or on other TCP/IP networks. Static IP address This is an IP address that doesn’t change. Any computer can connect to it, thereby making video surveillance systems with static IP addresses remotely accessible from any location on the Internet. Synchronization Frame formation in multi surveillance camera systems is started simultaneously by the process of synchronization, and there are differing ways this process can be achieved.
Simplex A type of multiplexer that allows you to simultaneously record images to tape and display the live, full screen image of any individual security camera (compare this to the duplex type which can also display multiple-picture screen images while recording). A simplex multiplexer can display multiple-picture screen images, but it cannot record at the same time. Also unlike a duplex multiplexer, it is unable to record and playback recorded tapes simultaneously.
SNMP
SSL/TSL (Secure Socket Layer/Transport Layer Security)
These two protocols SSL is succeeded by TSLare cryptographic protocols that provide secure communication on a network. SSL is commonly used over HTTP to form HT TPS, as used e.g. on the Internet for electronic financial transactions. SSL uses public ket certificates to verify the identify of the server.
subnet mask
A group of selected bits that identify a sub network within a TCP/IP protocol.
Server
Signal to Noise
It is the ratio between the signal voltage and the noise voltage generated by an electronic circuit. It is measured in decibels (db).
T
TCP/IP (Transmission Control Protocol/Internet Protocol) These protocols enable communication between differing computer and computer networks. The IP is a connectionless protocol that provides the packet routing, while the TCP is connection based to provide reliability in communication and multiplexing.
Te lnet
T elnet is a simple method with which to access another network device, e.g. a computer. The HTTP protocol and the FTP protocols allow you to request specific files from remote computers, but do not allow you logon as a user of that computer. With Telnet, you log on as a regular user with whatever privileges you may have been granted for specific applications and data residing on that computer.
TVL (TV Lines) A method of defining resolutions in analog video. Topology
The physical and logical layout of the devices in a network. Transceiver: A device that transmits and rece ives network signals.
Twisted pair
Twisted pair is a type of balanced cable in which a pair of cables is twisted and the signal is divided between them.
U
UDP (User Datagram Protocol) UDP is a communications protocol that makes possible the sending of datagram messages from one computer to an application in another computer. It’s connectionless and suffers from unreliability, since it is unable to check for any errors in delivery. UDP is often a protocol used in video streaming because it ignores lost data and continues the live feed of information (this being preferable to the interruption of real-time data while attempting to retransmit lost data).
UPS (Uninterruptible Power Supply) Justifiably popular with many electronics users, a UPS stores electricity in a battery and supplies power to a system (allowing a user to shut down w/out losing data or continue for a specific time period) during a power failure.
URL (Uniform Resource Locator) The URL is the Internet address that a software browser requires in order to find that Internet resource.
UTP (Unshielded Twisted Pair) This type of cable is used to transmit video signals across distances greater than a coaxial cable can handle. The RG59 standard of UTP cable is roughly 600 ft. In conjunction with video baluns, they can stretch over 1200 ft. for full color video. UDP is cost effective too, mainly due to lower costs than coaxial cable, being easily terminated, and being capable to carrying data, video, and audio signals across the same cable with little interference.
Unicast
Communication between a single sender and a single receiver over a network. A new connection is established for each new user.
URL (Uniform Resource Locator) An “address” on the network.
USB (Universal Serial Bus)
A plug-and-play interface between a computer and peripheral devices, e.g. scanners, printers, etc.
V
Vari-focal len s This type of lens has the capability of varying its focal length in order to zoom in on images. An auto iris feature is required in order to achieve this. Vari-focal lenses are contrasted with fixed focal lenses, which are less expensive and often allows more light to pass through them at their set length, enabling better detection in low light circumstances.
Vertical resolution The number of horizontal lines resolved in a picture is called the vertical resolution, and is determined by the television scanning method, be it NTSC, PAL, or some other format.
Video compression This technique (often a MPEG format) compresses video into lower bit rates for easier Internet transmission, often along narrower bandwidths. Video or audio is compressed to shrink file size, ensuring acceptable transfer speed. Compressed video can sometimes be of a noticeably lower quality, but still clear enough to be useful. AVC is the successor to MPEG as the new video compression standard.
Video intercom Used at door entryways, this system utilizes audio and video for communication or movement control of people.
Video server This enables an analog camera to be converted into an IP camera, able to stream digital video over an office network, phone, or ISDN connection. Therefore, an analog based surveillance system can be upgraded and networked to function as an IP surveillance system.
Video streaming Streaming video delivers compressed multimedia content over the Internet in a stream of packets. Viewers view the file as it downloads, instead of downloading the entire file first. Streaming video first initializes the transfer, and then buffers it. Bandwidth determines both picture quality and whether or not the viewed video catches up with the downloading content, which causes the video to stop. RealPlayer is one of the most popular free streaming video players available. Video streaming is commonly used for viewing live feeds from security cameras, with RTSP/RTP being the main streaming technology currently in use.
Video surveillance This term refers to the use of CCTV , DVR, and IP Camer a to monitor secure sites, or portions thereof. Video Surveillance systems can start with a few as one camera. For systems using more than 16 cameras, enterprise video surveillance systems are preferable. The many terms defined in this glossary give an idea of the many options available for different security needs and situations. In today’s professional world, Video Surveillance (often referred to as CCTV) is the most cost effective way to achieve loss prevention.
VPN
Virtual Private Networks can be set up in the Internet by encrypting the packets at the host server and than sending it to the destination server, where it is decoded. This allows secure communication between two locations.
Video Motion Detection
Video Motion Detection is a device that can detect unwanted movement in the picture and then generate an alarm
VMD
Video Motion Detector is a device that can detect unwanted movement in the picture and then generate an alarm.
W
WAN (Wide Area Network) A WAN is a communications network serving a geographically large area using satellite communications or telephone lines. The Internet is a WAN. Network IP Cameras are capable of utilizing WAN systems.
White balance CCD security cameras feature this adjustment to compensate for ambient light color . Since there’s a color difference between standard light bulb light and sunlight, white balance adjusts to ensure a more realistic picture. This feature may be set by manual adjustment, or it may have preset settings for the most common situations.
Wide angle lens This lens enables a wide view of the scene, with a magnification ratio less than 1.
Wireless The wireless transmission of video signals can be carried out over both short and long ranges, with 2.4 to 5 GHz devices for short distances and high-power line dedicated site solutions for several miles or more.
W-LAN (Wireless LAN)
A wireless LAN is a wireless local area network that uses radio waves as its carrier: where the network connections for end-users are wireless. The main network structure usually uses cables.
Web server
A web server is a program, which allows Web browsers to retrieve files from computers connected to the Internet. The Web server listens for requests from Web browsers and upon receiving a request for a file sends it back to the browser.
WEP (Wireless Equivalent Privacy)
A wireless security protocol, specified in the IEEE 802.11 standard, which is designed to provide a wireless local area network (WLAN) with a level of security and privacy comparable to that usually expected of a wired LAN. Security is at two different levels; 40-bit and 128-bit encryption. The higher the bit number, the more secure the encryption.
WPA-PSK (Wi-Fi Protected Access-Pre-Shared Key)
This wireless encryption method uses a pre-shared key (PSK) for key management. Keys can usually be entered as manual hex values, as hexadecimal characters, or as a Passphrase. WPA-PSK provides a greater degree of security than WEP.
Web browser
A computer program that uses the Hypertext T r ansfer Protocol (http) and is used on a workstation to communicate with other devices on the Web.
X Y Z
Zoom lens A zoom lens has the advantage of offering a variable focal length to view both wide angle to telephoto scenes.
Zoom ratio This measures the ratio between the maximum and minimum focal length that a zoom length is capable of.
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