IB ITGS

A cellular telephone's main source of RF energy is produced through its antenna. The antenna of a hand-held cellular telephone is in the handset, which is typically held against the side of the head when the telephone is in use. The closer the antenna is to the head, the greater a person's expected exposure to RF energy. The amount of RF energy absorbed by a person decreases significantly with increasing distance between the antenna and the user. The intensity of RF energy emitted by a cellular telephone depends on the level of the signal sent to or from the nearest base station (1).

When a call is placed from a cellular telephone, a signal is sent from the antenna of the phone to the nearest base station antenna. The base station routes the call through a switching center, where the call can be transferred to another cellular telephone, another base station, or the local land-line telephone system. The farther a cellular telephone is from the base station antenna, the higher the power level needed to maintain the connection. This distance determines, in part, the amount of RF energy exposure to the user.

Communications data is crucial to the fight against crime and in keeping people safe. It is a highly technical area and one which demands a fine balance between privacy and maintaining the capabilities of the police and security services

The Home Office says it wants to change the law to compel communication service providers (CSPs) to collect and retain records of communications from a wider range of internet sources, from social networks through to chatrooms and unorthodox methods, suc

ecret security services have legal powers in the UK to intercept communications in the interests of combating crime or threats to national security.