Tuesday, November 24, 2009

JUNIPER ROUTER














M40 was the first product by Juniper Networks, which was released in 1998. [6] The M40 was the first of its kind capable of scaling to meet the internet standards ,which can move 40 million packets per second with a throughput rate in excess of 40 gigabits per second. [13] With the initial offering of m40, Juniper came up with the Internet Processor I. The proprietary ASIC was the fundamental core of Juniper's Packet Forwarding Engine (PFE). The PFE consisted of a shared memory, a single forwarding table, and a one-write, one-read architecture.The entire PFE was capable of forwarding at 40 Mpps, a capacity more than 100 times faster than that of any other available router architectures at that time. [6] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] The M40 is one of the first routers on this scale, about 10 times faster than Cisco's 12000. [23]

INFORMATION OUTLET


















In a telephone wiring system in a building, a connection device designed for a fixed location (usually on a wall) in which telephone wiring terminates; the outlet contains a female jack to receive a male plug that is inserted into it. Such outlets are used to connect a telephone, FAX, telephone answering machine, etc., to a telephone line.
The invention provides a central location for receiving voice, video, and data signals. A plurality of user locations are connected to a single central location. Each user location is connected to the central location by means of a single coax wire, and voice, video and data are all multiplexed over the coax, so that increased data capabilities can be added to individual user locations without the need to rewire existing user locations. This is particularly advantageous where such user locations have already been wired, and where rewiring would be a difficult and expensive process, e.g., passenger cabins on board a cruise ship.

MODULAR JACK


















Modular connector is the name given to a family of electrical connectors examples of which are pictured. These connectors were originally used in telephone wiring. Even though they are still used for that purpose they are used for a variety of other things as well. A modular connector's advantage over many other kinds include small size and ease of plugging and unplugging. However the plastic retaining spring clip tends to get broken off when cables are pulled from storage for use. If that happens, the plug can easily fall out of the wall jack. Many uses that originally used a bulkier connector have migrated to modular connectors. Probably the most well known applications of modular connectors is for telephone jacks and for Ethernet jacks, which are nearly always modular connectors.

PATCH PANEL

















patch panel or patch bay is a panel, typically rackmounted, that houses cable connections. One typically shorter patch cable will plug into the front side, whereas the back holds the connection of a much longer and more permanent cable. The assembly of hardware is arranged so that a number of circuits, usually of the same or similar type, appear on jacks for monitoring, interconnecting, and testing circuits in a convenient, flexible manner.

Patch panels offer the convenience of allowing technicians to quickly change the path of select signals, without the expense of dedicated switching equipment. This was first used by early telephone exchanges, where the telephone switchboard (a massive array of patch panels) and a large room full of telephone operators running it was ubiquitous.