Avocent, a business of Emerson Network Power, is an information technology products manufacturer headquartered in Huntsville, Alabama. Avocent was formed in 2000 from the merger of the world’s two largest KVM (keyboard, video and mouse) switch manufacturers: Apex and Cybex Computer Products Corporation. As of August 2006, the company employs more than 1,800 people worldwide.

The Avocent Emerge ECMS2000 digital workstation extender provides hardware-based digital desktop extension of video, keyboard, mouse, USB mass storage, and audio signals. The Emerge ECMS2000 solution allows users to back-rack digital workstations without impact to power user operations. The Emerge ECMS2000 extender consists of a computer node and user node interconnected in a point-to-point manner at Gigabit Ethernet rates using IP protocols over a single UTP cable.

The Emerge ECMS2000 digital workstation extender meets the demanding needs of today's rich digital content applications, including high resolution video, deep color depth, uncompromised responsiveness, CD quality audio, and compatibility with a wide range of user interface devices - while mission critical servers are securely maintained and managed.

In electronics, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.

The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.

Mercury tilt switch
The mercury switch consists of a drop of mercury inside a glass bulb with 2 or more contacts. The two contacts pass through the glass, and are connected by the mercury when the bulb is tilted to make the mercury roll on to them.

Knife switch
Knife switches consist of a flat metal blade, hinged at one end, with an insulating handle for operation, and a fixed contact. When the switch is closed, current flows through the hinged pivot and blade and through the fixed contact. Such switches are usually not enclosed. The knife and contacts are typically formed of copper, steel, or brass, depending on the application. Fixed contacts may be backed up with a spring. Several parallel blades can be operated at the same time by one handle.

Footswitch
A footswitch is a rugged switch which is operated by foot pressure. An example of use is for the control of an electric sewing machine. The foot control of an electric guitar is also a switch.

Reversing switch
A DPDT switch has six connections, but since polarity reversal is a very common usage of DPDT switches, some variations of the DPDT switch are internally wired specifically for polarity reversal. These crossover switches only have four terminals rather than six. Two of the terminals are inputs and two are outputs. When connected to a battery or other DC source, the 4-way switch selects from either normal or reversed polarity. Such switches can also be used as intermediate switches in a multiway switching system for control of lamps by more than two switches.

A router is a device that forwards data packets between computer networks, creating an overlay internetwork. A router is connected to two or more data lines from different networks. When data comes in on one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey. Routers perform the "traffic directing" functions on the Internet. A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it gets to its destination node.
Routers may also be used to connect two or more logical groups of computer devices known as subnets, each with a different sub-network address. The subnets addresses recorded in the router do not necessarily map directly to the physical interface connections. A router has two stages of operation called planes.

Control plane: A router records a routing table listing what route should be used to forward a data packet, and through which physical interface connection. It does this using internal pre-configured addresses, called static routes.A typical home or small office router showing the ADSL telephone line and Ethernet network cable connections.

Forwarding plane: The router forwards data packets between incoming and outgoing interface connections. It routes it to the correct network type using information that the packet header contains. It uses data recorded in the routing table control plane.