1. How should I connect my NEW proposed data centre in India (Delhi) with the central data centre in Germany ?
2. what sort of International Link I should go for ?
3. who are the solution provider in India can provide such International connectivity ?
here is the prodcut you are looking for
Chose what fits your budget. You can also order CoS for voice.
A dedicated circuit as mentioned earlier is expensive. Further, dont spend too much money on WAN bandwidth, use Cisco WAAS . The savings on bandwidth will justify deploying WAAS.
Hope the above was helpfull