Nowadays, we use the Internet or intranet line as a video transmission
method. DSL and T-1 are used for the Internet and LAN (or WAN) is for intranet.
DSL
DSL (Digital Subscriber Line) speed is from 144 Kbps to 1.1 Mbps. (More than 1.5 Mbps speed is called T-1), you need use a router with RJ45 jack to connect a web camera to a DSL, DSL supplier provides the router. If you need to connect several web cameras, you need a hub with multiple RJ45 jacks. You will have static and public IP address(es) (provided by the DSL supplier) assigned to the web camera(s). This IP address will act as a web site address on the Internet.
SDSL(Symmetric DSL) is strongly recommended. SDSL has same upstream and downstream bandwidth, while downstream bandwidth of other DSL (IDSL or ADSL) is larger than upstream bandwidth. We should upload web camera's video data to the Internet, so a SDSL is more suitable for the web camera. To see the pictures from the camera, a residential DSL or even Cable TV line will be fine. (Refer to the bandwidth and the speed of a web camera for detail)
LAN
LAN (Local Area Network) or WAN (Wide Area Network) has intranet network in a limited area or organization and has several computers connected to the network. Web camera servers acting as computers can be connected to LAN or WAN so that each computer can share the video data. The jacks between Web camera servers and LAN or WAN is RJ45.
DSL
DSL (Digital Subscriber Line) speed is from 144 Kbps to 1.1 Mbps. (More than 1.5 Mbps speed is called T-1), you need use a router with RJ45 jack to connect a web camera to a DSL, DSL supplier provides the router. If you need to connect several web cameras, you need a hub with multiple RJ45 jacks. You will have static and public IP address(es) (provided by the DSL supplier) assigned to the web camera(s). This IP address will act as a web site address on the Internet.
SDSL(Symmetric DSL) is strongly recommended. SDSL has same upstream and downstream bandwidth, while downstream bandwidth of other DSL (IDSL or ADSL) is larger than upstream bandwidth. We should upload web camera's video data to the Internet, so a SDSL is more suitable for the web camera. To see the pictures from the camera, a residential DSL or even Cable TV line will be fine. (Refer to the bandwidth and the speed of a web camera for detail)
LAN
LAN (Local Area Network) or WAN (Wide Area Network) has intranet network in a limited area or organization and has several computers connected to the network. Web camera servers acting as computers can be connected to LAN or WAN so that each computer can share the video data. The jacks between Web camera servers and LAN or WAN is RJ45.
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