Just to let people know that due to Airtel and MTNL retarded routing MTNL is also indirectly blocking VOIP calls particularly Betamax service. Since 12th Feb 09, all calls are being blocked. Here is a tracert from sip.voiparound.com. IP 203.101.95.30 belongs to Airtel (Bharti) and MTNL routes through Airtel for some of it's connections.C:\Documents and Settings\*******>tracert sip.voiparound.comTracing route to sip.voiparound.com [194.120.0.198]over a maximum of 30 hops: 1 2 ms