CAAQM S – Continuous Ambient Air Quality Monitoring Station.

Generally there would be three AAQ stations as per OSPCB instructions. We

are currently receiving pollution level data from one AAQ station in JSPL. Its

brand name is ENVIROTECH ONLINE BTS -Base transceiver station. General Telephone Towers from which our mobile

get signals.

Abbreviation:

APN: Access Point Name

BIS: Business Information System

SGSN: Serving GPRS Support Node

CGSN: Coastal & Global Site Node

GPRS: General Packet Radio Service

ISD: Information Service Division / Instructional System Design

MODEM: Modulator Demodulator

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JSPL CENTRAL SERVER

OSPCB SERVER

GPRS DEVICE

JSPL PLANT

GPRS TOWER

Serving GPRS support node (SGSN)

A serving GPRS support node (SGSN) is responsible for the delivery of data packets from

and to the mobile stations within its geographical service area. Its tasks include packet

routing and transfer, mobility management (attach/detach and location management),

logical link management, and authentication and charging functions. The location register of

the SGSN stores location information (e.g., current cell, current VLR) and user profiles

(e.g., IMSI, address (es) used in the packet data network) of all GPRS users registered with

this SGSN....

What is a router?

A router is a common piece of networking equipment that transmits information between

two networks. The term is commonly used to describe home networking equipment that

connects computers on a local area network (LAN) and other devices to the Internet using a

single Internet connection.

Routers used in home networking usually include an Ethernet hub for wired networking, and

may also include equipment for wireless networking. Wired routers are often known as cable

or DSL routers, and wireless routers are commonly known as wireless access points.

LAN switching is a technology that promises to increase the efficiency of local area networks

and solve the current bandwidth problems. This paper covers switch features, switching

architectures, protocol support and management functions provided in switches and

provides some guidelines for switch shopping. It also touches on how switches can be used

to implement virtual LANs and ease management functions.

By: Ram Kishor Verma

Envirotech Online.