As BSNL only had been peering through NIXI, they have added DE-CIX Mumbai to the list according to peering DB. Now I think the services of BSNL are going to improve. Also, they have added a POP at GPX global systems Mumbai.
GPX India adds NIXI to the GPX Interconnection Ecosystem | GPX Global Systems Inc.
PeeringDB
GPX India adds NIXI to the GPX Interconnection Ecosystem | GPX Global Systems Inc.
PeeringDB