GSM operators may approach TDSAT challenging Telecom Regulatory Authority of India's directive, which asked them to give interconnection to Reliance [Get Quote] Communication GSM network.

"We are certainly examining legal option and will take a call on this today," GSM operators association Cellular Operators Association of India Director General T V Ramachandran told PTI.

The telecom regulator in the second ultimatum to GSM operators, including Bharti, Vodafone and BSNL, has given August 21 as the deadline to give interconnections to the RCom GSM network.

Trai has cited it as a licencing condition to provide interconnection among the service provider implying if a mobile operator does not give interconnection to another based on mutual commercial agreement, it is a violation of license condition attracting penalty.

GSM operators on their part said, Reliance GSM has a new network for which commercial term has to be re-negotiated. The existing arrangement between RCom and GSM operators are for the CDMA network