ok guys, i have managed to pinpoint the problem, its actually what i suspected all along..MTNL is not blocking SIP, its reliance that is the culprit :madness: and most probably the buggers at MTNL dont even know 🙁
here's a normal tracert using ICMP packets to voxalot -- shows no problem
Tracing route to us.voxalot.com [64.34.173.199]
over a maximum of 30 hops:
1