CarTel Communications is a dynamic, well established company at the forefront of mobile communications technology. Established in 1983 CarTel has grown rapidly to become one of the Midlands leading suppliers of two-way radio, mobile data, trunked radio systems, and fleet vehicle tracking providers.
All PMR446 radio products can be used without a radio licence providing that they comply with the requirements of the PMR446 European standard licence-free radio service.
PMR446 utilises eight 12.5khz spaced channels in the 446MHz band. Ofcom, the UK regulator, requires that radios have a maximum of 500mW (1/2 watt) ERP (Effective Radiated Power) to an internal (fixed) antenna. This limits the range to approximately one mile in a rural area and up to two miles in open country or line of sight.
There are eight 12.5 kHz simplex frequencies which can be used anywhere in the United Kingdom. The frequencies have been harmonised (but not necessarily authorised) for use across Europe. PMR446 radio equipment can be used in CEPT member countries that have implemented the ERC. Before using PMR446 radios outside the United Kingdom, users should check that the relevant administration has implemented the Decisions. Users who fail to do this and use their radios overseas, may break the laws of the country concerned, run the risk of prosecution and the confiscation of equipment.
The channels centre frequencies are as follows:
1. 446.00625 MHz 2. 446.01875 MHz 3. 446.03125 MHz 4. 446.04375 MHz
5. 446.05625 MHz 6. 446.06875 MHz 7. 446.08125 MHz 8. 446.09375 MHz
CTCSS (continuous tone controlled sub-audible squelch) is incorporated in most radios as a means of preventing interference - the radio ignores all incoming signals except those that are also transmitting the same sub-audible tone. As a licence exempt service, PMR446 is unprotected and Ofcom will not become involved in interference or channel sharing disputes between users. You should NOT use PMR446 for life or safety applications.
Before speaking you should check that a frequency is free by either listening or using the channel busy indicator. When you speak you should identify yourself and the person you are calling. All users will benefit if messages are kept short.