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This course is designed for DW Installation & Service Techs to learn how to install, configure, and troubleshoot IP cameras and DVRs/NVRs. The course covers topics such as IP networks, network cables, network addressing, network routing, and network troubleshooting.
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DW IP Cameras & VideoWatch Installation January 2011
Course Introduction • Designed for DW Installation & Service Techs, as well as Central Programming • 3.5 Hour Class • Reference Materials • Hands on Course • Goals Objectives
Goals & Objectives • Install Network Cable w/ RJ-45 connector • Install & configure basic network addresses • Install & configure basic network routing • Troubleshoot network/connectivity • Install & configure IP cameras & DVR/NVRs • Troubleshoot IP Cameras & DVR/NVRs
Outline • IP Networks • Network Cables • Network Addressing • Network Routing • Network Troubleshooting • VideoWatch by Datawatch • IP Cameras • VW DVRs/NVRs • VW Standalone Cameras • IP Camera Troubleshooting
Pre-Configure • At this point, Camera Systems to be pre-configured at DW central before they are brought to field • If everything runs smoothly, tech will only have to plug components in to network to have functioning system. • Internet connectivity may have to be configured on site.
DW Support Structure • Tier 1 – Field Technician to establish IP connection to allow DW to dial in • Tier 2 – Designated Central Personnel (currently Dan Summers, subject to change) • Tier 3 – Designated Video Engineer (currently Dan Summers)
CAT5 Cable • CAT5e is plenum grade Unshielded Twisted Pair (4 pair) • Networks send up to 100,000,000 bits per second over each cable • The twisted pairs shield the signal from interference • No kinks or splices in wire, maximum of 100 meters (300 ft)
CAT6 Cable • CAT6 is similar to CAT5e, with better/heavier insulation on cable and individual wires • Supports speeds 10X faster than traditional CAT5 (1GBPS rather than 100MBPS) • Also used in situations of high electronic interference
Network Tools • Crimpers • Cable Tester
Video of Ethernet connection • http://www.livescience.com/common/media/video/player.php?videoRef=ethernetcable
Routers • Devices that control IP traffic between different networks • Routers control IP access into/out of network • Routers provide high level functions for network, including DHCP and gateway
Router Diagram Internet WAN IP: 173.10.130.249 LAN IP: 192.168.0.1 LAN 192.168.0.3 LAN 192.168.0.21 LAN 192.168.0.22 LAN 192.168.0.23
Switches / Hubs / Bridges • Switch is device that connects IP devices together in same network, and controls some traffic flow • Hub is a device that connects IP devices together, with no traffic control • Bridge connects two different network mediums together (ie DSL line and Ethernet cable, or Cable Modem and Ethernet)
Network Interface Cards (NICs) • NICs are the ports that the network cable plug into on the device • Usually LED will be lit to indicate network connectivity • Some devices are Powered over Ethernet (PoE). Power is delivered over the network cable to the device
MAC Addresses • Media Access Control Address • Every network device in the world has unique MAC address • Routers & Switches send traffic to their local devices via MAC address, not IP • MAC addresses not routable between networks, need TCP/IP to do this
IP Addresses • IP Addresses are the configured address of a device • Each IP address has to be unique – no duplicates on the network or anywhere in the world • Think of it like sending physical mail – every address is unique • Example - 192.168.0.2
IP Addresses on Network • On a single network, the network addresses will be very similar to each other – each router is only able to work with its own network’s traffic
Private IP Addresses • Because the # of IP addresses was going to be used up, a convention was invented to make certain IP addresses “Private” • Routers will not send traffic with/from these specific IP ranges out from their local network • Private Ranges: • 10.0.XX.XX • 172.16.XX.XX • 192.168.XX.XX
Private IP Addresses to Internet • These private IP addresses are what most LANs use. • For these devices to get Internet Access, their router will translate the private address into a (public) IP address, one that can be routed over the internet • When the router receives the data from the internet, it translates it back to the private IP address, and sends it to the local computer • This process is called NAT (Network Address Translation)
Network Address Translation(NAT) • NAT is the process that a router will “re-address” traffic from one IP to another so that multiple computers can share one public IP address to receive internet traffic • Note that NAT is done inside of the router – the computers do not know that it is happening. • NAT allows internal computers to share one public IP address for internet traffic (outbound traffic only)
Public IP Addresses • Public IPs are controlled by an international organization who will regulate IPs as needed. • Internet Service Providers, like Verizon and Comcast, get a large range of IPS, and they lease them out to Datawatch and our clients.
Subnet Mask • EASY - Just Type in provided subnet mask • Each IP address contains two parts – the network number and the device number • 192.168.0.21 – unable to know what part is the network ID, and what part is the Device ID • Subnet Mask is how the router and machine knows where to split it • Subnet Mask of 255.255.255.0 tells the device that its network ID is 192.168.0, and its device ID is .21 • Good Rule of Thumb for DW: • FOR DW NETWORKS(NVRS), will use 255.255.255.0 for IP NVR systems • ISP or cutomer network may give us a different subnet mask for public IP – use the provided mask in the device/router
Default Gateway • EASY - Just Type in provided default gateway (will be router ip address) • Each device will prompt for a default gateway • This default gateway is IP address that all traffic will be sent to • It is the LAN address of the router
Domain Name Service (DNS) • DNS is the system that translates a computer name to an IP address • www.google.com needs to be translated into an IP address to send data to it • Internet servers (DNS servers) are responsible for figuring out the IP address of these names • DNS is required for any internet browsing, since it resolves the names to IP addresses
DHCP • Instead of having to type in the IP address for each device(could be 100’s on a network), DHCP is a network service that automatically assigns a temporary IP to devices as they start up • It “leases” the IP to the device for a period of time (i.e. 1 day) • When the lease expires, the device will renew its lease
DHCP – IP Cameras • On IP camera systems, it will not work to have the cameras or NVR using DHCP – these devices should be set to a fixed IP • Otherwise, the NVR will not know the IP address of the camera (since it changes), and will not be able to record it • DHCP should still be enabled on the router, so that when a tech plugs their laptop in, they do not have to manually change their IP address
Static or One-to-One NAT • Static or One-to-One NAT is the configuration that allows Datawatch Central to dial into a device that is on a private IP address • Regular NAT allows access from LAN out, but does not allow the internet to dial in directly – Static NAT does • Configure the router to take unsolicited outside traffic, and redirect it to a designated internal IP address
Static NAT or One-to-One NAT Connection Request to 173.10.130.251 With these three standalone cameras, this configuration would require four static public IPs – three for the cameras, one for the router Router redirects traffic for 173.10.130.251 to private IP 192.168.0.21 Private IP 192.168.0.21 Private IP 192.168.0.22 Private IP 192.168.0.23
Static NAT or One-to-One NAT Connection Request to 173.10.130.251 With these three cameras and one NVR, this configuration would require two static public IPs – one for the NVR, one for the router Router redirects traffic for 173.10.130.251 to private IP 192.168.0.21 Private IP 192.168.0.24 Private IP 192.168.0.21 Private IP 192.168.0.22 Private IP 192.168.0.23
LAN/WAN/INTERNET • Local Area Network – this is a single network, typically setup with private IP addresses • Wide Area Network – this is a collection of networks that are connected to each other. • The Internet is a WAN
Network Routing • Routers have two sides that they receive traffic on – the internal or LAN side, and the external or WAN side • Routers determine what to do with each IP packet – forward it on, or ignore it • Routers may be configured to forward requests from LAN to WAN, but deny access from WAN to LAN
Router Config • Setup Time/Date • Setup WAN connection • Setup LAN connection • Setup DHCP for LAN • Setup Router’s Routing Permissions if needed • Setup Static NAT