Applicability of section 195 for air travel agents

Dear Sir/Madam,

Our's is an air travel agency where we purchase and sell tickets. we operate in a B2B environment. our suppliers are spread across the world. I have two questions here:

1. Is the amount paid to my supplier from whome I purchase tickets liable for TDS u/s 195?
2. Do I have to obtain Tax Residency Certificate, Form 10F and no PE declaration from my suppliers?

Please let me know if you need any additional inputs to answer my question.

Thanks

Sandeep