Section 9(vi) in Regulation on Quality of Service of Dial-Up and Leased Line Internet Access Service, 2001
(vi)The Authority has mandated a Grade Of Service norm for the circuit group connecting the PSTN node to the ISP node, as congestion on any link can degrade the performance of other links and nodes in the Public Switched Telephone Network of the BSOs. Any circuit group congestion in the PSTN results in reattempts being made by the subscriber to gain access to his called destination, thus causing congestion elsewhere in the network.
