802.11n Wireless enables you to place cameras in areas that extend beyond where it may be feasible to have a physical connection, such as a remote area of a parking lot or the edge of a large property. 802.11n is the latest IEEE standard for WiFi, enabling transfer rates of up to 660 MBPs over distances covering up to 300 meters between switches or access points. Managing bandwidth can only be done from the perspective of overall network capabilities. While improving data compression technology will continue to reduce the bandwidth required for streaming video, there is no question that careful planning and management is required.
Quality of Service (QoS) is especially important for viewing surveillance in real time. If you are deploying video surveillance over a corporate IP network that also supports VoIP, you should have the IP cameras on their own VLAN or physical LAN and set QoS priorities appropriately to keep mission-critical functions such as order-taking from being swamped by video feeds.
Network Storage: The expanded use of video can create challenges in managing both network bandwidth and network storage. The demand for storage used for video surveillance is expected to exceed 3.2 exabytes of capacity within the next three years, according to the research firm Global Information Inc., which also notes that iSCSI SANs are the fastest growing solution for video surveillance storage.
Vance Kozik is Director of IP Surveillance Product Marketing for D-Link Systems Inc., which offers end-to-end IP surveillance systems with IP cameras, network switches, video storage devices and video management software. To request more info about D-Link, visit www.securityinfowatch.com/10455193. This article is adapted from a full whitepaper, which is available at www.securityinfowatch.com/11191610.