OT Systems

Traditionally, CCTV refers to video surveillance systems that use traditional standard definition (SD) analog cameras and are hard wired to a DVR using coaxial cables. Many users face difficulties and become frustrated while upgrading a CCTV system to IP surveillance. OT Systems’ Ethernet-over-Coax (EoC) solution is an alternative for system integrators and service providers looking for a perfect solution to utilize existing coax infrastructure and to migrate to an IP-based system. Taking advantage of the existing coaxial cables, users and installers do not need to rewire the environment to quickly provide a high-performance CCTV upgrade. Also, the EoC solution provides flexible communications and 30-watt high power capabilities with power-over-coax (PoC) technology to remote PoE IP cameras or PTZ cameras. Users can easily check a video stream from the center network system. This EoC retrofit easily repurposes existing coaxial cable infrastructure, enhances the system with centralized power and creates a feature-rich IP surveillance systems.

Some OT Systems’ Ethernet switches and fiber media converters support redundant power systems that provide users with uninterrupted network services in the event of an internal power supply failure. It automatically senses when a connected device has experienced an internal power supply failure and immediately begins to take over powering to the device, providing continuous monitoring without device reboot.

Power over Ethernet (PoE) is the ability to deliver 48VDC of power over the same copper cable as Ethernet. Two primary elements are required in order to implement power over Ethernet (PoE). They are:
(1) Power sourcing equipment (PSE) - the LAN switch or power source delivered over Ethernet
(2) The powered device (PD) - the end device that accepts and uses power from the Ethernet cable for operating

The most common type of media converter is a device that functions as a transceiver; converting the electrical signal used in a copper Unshielded Twisted Pair (UTP) network into light waves used in fiber optic cabling.
Media converters are typically protocol specific and are available to support a wide variety of network types and data rates. They are available as a physical layer or Layer 2 switching devices. Media converters with Layer 2 switching capability provide rate-switching and other advanced features.

IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP) network traffic. The feature allows a network switch to listen in on the IGMP conversation between hosts and switch. By listening to these conversations the switch maintains a map which links need IP multicast streams. Multicasts may be filtered from the links which are unnecessary and thus control which ports receive specific multicast traffic.