Tata Teleservices whose CDMA network is mainly run on equipment supplied by Chinese telecom vendors, asked the DoT to ascertain the exact nature of the problem with these equipments or vendors from the government.

"As a Tata company, it goes without saying that we are committed to protect national security and hence, we seek your guidance as to what is wrong with these equipment or vendors and what needs to be done by us or by these vendors to remain compliant with the requirements of national security," said TTSL in its letter to DoT Secretary P J Thomas.

The company said that due to the delays in granting clearance for essential equipments, the company’s network and quality were greatly being impacted. It also said that equipment being provided by some of the European vendors was also manufactured in China.

"We need to understand that many European brands are also getting their network equipment manufactured in China, what is going to be the policy of DoT as regards such equipments," said the company.