Generally, if the number of subscribers is over 200, all expenses are covered in one year. Such industries as oil and gas, railroads, and auto transportation utilize trunked systems. In Siberia, trunked communications are developing into a general trunking system which will be used by the transportation industry and the oil and gas industry. Commercial companies which have warehouses, trading outlets, transportation, and employees spread out are effectively managed by mobile communications systems. Trunked systems have advantages for such users in comparison with cellular or paging communications.
Cellular communications are more expensive, and connection requires more time.
Pagers can transmit signs and cannot transmit voice data. Regular radio stations are unable to establish good connection in urban areas and have restricted functional capabilities. The market for trunking communications is emerging in Russia. The first trunking radio systems appeared in Russia ten years ago and were based on inexpensive SmarTrunk II equipment, which is currently used in industrial trunking networks covering only one zone. While designing multifunctional multizone trunking networks, trunked systems which utilize the MPT-1327 protocol are preferred.