Continuing to push back against the stringent quality of service (QoS) norms brought in by the Telecom Regulatory Authority of India (Trai), telcos have informed the Department of Telecommunications (DoT) that collection and submission of monthly and site-to-cell-level data should be eased, officials and industry sources said.In place since October last year, the QoS norms call for data for network availability, call drop, voice packet drop rate in uplink and downlink, among other parameters, to be collected at the cell level.