Explanation:

Very good explanation of Points of Interconnection (POI) and the spat between Jio and Big 3 incumbent carriers — Bharti Airtel, Vodafone India and Idea Cellular. A question can be asked on POI in this year UPSC.
https://www.quora.com/What-do-interconnection-points-mean-in-telecom-industry-Why-does-Reliance-Jio-need-them-and-other-telecom-operators-are-refusing-to-provide-the-same
This was the context in which The Telecom Regulatory Authority of India (TRAI) in January 2018 had issued the Telecom Interconnection Regulations 2018 that comprises rules for crafting network connectivity agreements, provisioning of such connectivity amongst operators at initial stages, augmentation of Points of Interconnect (POI), applicable rates or charges, disconnection of ports, and financial disincentive on interconnection issues.
 

Important Highlights of the rules:

• Now, it requires that the telecom operators have to sign an interconnection agreement on a non-discriminatory basis within 30 days of receipt of a network connectivity request from a rival service provider.
•    A penalty of a maximum of Rs1 lakh a day per circle for operators that violate these rules. There are 22 telecom circles in the country and most top operators are now present in all of them.
•    These regulations assume significance since there were no clear guidelines on the time frame for entering into such network connectivity pacts.
•    In addition, the previous interconnect agreement rules did not provide for any penalties on defaulting operators.
•   Interconnection means the commercial and technical arrangements under which service providers connect their equipment, network and services for the benefit of customers across their networks.
•    Point of interconnect (PoI) is a mutually agreed point of demarcation where the exchange of traffic between the two operators takes place.

For more details of Rules
https://www.livemint.com/Industry/VP8hNM8BrhyftK3DXJF6eM/Trai-issues-interconnectivity-rules-fixes-30day-deadline-f.html