The prevailing telecom tariffs are likely to undergo a change with the Telecom Regulatory Authority of India on Wednesday announcing its much-awaited revised interconnect charges for the sector.

Trai, in its revised IUC regime, has spared the WLL mobile and cellular operators from paying any additional charge for using each others' network for calls within the circle.

In the case of inter-circle calls (calls from one state to another), network charges have been imposed ranging between 30 paise per minute for calls upto 50 kilometres, 50paise for calls for a distance of 50-200 kilometres and 80 paise for above 200 kilometres.

On all the international long distance calls, a charge of Rs 4.25 has been fixed between all types of services.

Trai said basic telecom tariffs would be determined by market forces.

As per the revised regime, Trai has estimated the access deficit of state-owned Bharat Sanchar Nigam Ltd at Rs 5,340 crore (Rs 53.4 billion), which is lower than the earlier estimates.