Section 2(2)(z) in Standards of Quality of Service of Basic Telephone Service (Wireline) and Cellular Mobile Telephone Service Regulations, 2009
(z)[ "Voice over LTE" or "VoLTE" means voice call established, maintained and released using IP (Internet Protocol) Multi-Media Sub-System (IMS).] [Inserted by Notification No. F. No. 304-2/2016-QoS., dated 18.8.2017 (w.e.f. 20.3.2009).]