While India is one of the more exotic countries, business practices are remarkably similar to those in New Zealand. Getting around India Air transport is improving however the most reliable airline is Jet Airways. It services all the main metros and has new modern aircraft. Faxs and Telephones Improving, but fax links to NZ are bad. Email links are generally reliable.
Most hotels offer email links.
Take a Hotmail account to keep in touch. Cell phones operate in all the main metros and roaming agreements are now in place with New Zealand. Avoid hotel phones as they are expensive. The yellow STD booths on every street corner are cheap and reliable. Hotels in India are wonderful, but expensive.