Citizens Band radio, abbreviated as CB radio, refers to a specific radio service for short-distance communication between individuals through a selection of 40 channels within the 27-MHz (11 m) band. This service is quite different from Amateur Radio, Multi-Use Radio Service and Family Radio Service in terms of operation. However its operation does not even require a license in many of the countries. Citizens Band radio also finds utility in personal or business communications which makes it starkly different from Amateur Radio. Similar to the other two-way radio services, a Citizens Band channel can be shared by several users. In this system, at a time only one station can transmit in a channel while the other stations are required to listen and wait for the availability of the shared channel. Half-duplex mode runs the system which implies that both the transmission and reception of the information cannot be done at the same time.

Regulation for Citizens Band Radio in India
India follows a distinct way of channel assignments which differs from the band plans used in other countries. The band plan of India comprises 40 frequencies spaced a relatively tight eight kHz apart. In addition to this, it also has a few offset channels which find utility in radio-controlled devices and mountaineering. However there are many other channels exclusively reserved for special tasks such as sporting events, disaster relief and forestry. It also serves the long-haul truck drivers greatly for communicating about traffic problems, directions and other significant matters. In India the frequency band that has been allocated for Citizens Band radio is 26.957-27.283 MHz. The effective radiating power which is used in India is 5 Watt.

Indian Citizens Band Radio channels

Frequency	Usage
26.964	Hobbyist comms
26.968 [offset]	Mountaineering
26.972	Hobbyist comms
26.976 [offset]	Mountaineering
26.98	Highway comms
26.988	spare
26.996	spare
27.004	Radio-controlled model aircraft
27.012	Rural comms
27.02	Radio-controlled devices, ex. garage door openers, alarms
27.028	Rural comms
27.036	Hobbyist comms
27.044	Highway emergency ( to contact police )
27.052	Highway emergency ( to contact EMS )
27.06	Marine lifesaving comms
27.068	Marine lifesaving comms
27.076	Disaster relief
27.084	Disaster relief
27.092	Forestry
27.1	Forestry
27.108	Radio-controlled devices, ex. garage door openers, alarms
27.116	Radio-controlled model aircraft
27.124	Hobbyist comms
27.132	spare
27.14	Mountaineering
27.148	Radio-controlled model aircraft
27.155 [offset]	Radio-controlled models, general
27.156	Radio-controlled model aircraft
27.164	spare
27.172	Rural comms
27.18	spare
27.188	spare
27.196	spare
27.204	Mountaineering
27.212	Rural comms
27.22	Sports events
27.225 [offset]	Radio-controlled models, general
27.228	Radio-controlled model aircraft
27.236	Highway comms
27.244	Sports events
27.250 [offset]	Radio-controlled toys and gadgets
27.252	spare
27.26	Radio-controlled toys and gadgets
27.268	spare
27.276	spare

This article is a stub. You can enrich by adding more information to it. Send your Write Up to content@indianetzone.com