Dear friend,
Well gentleman, we do not know your industry or business as such. Therefore, we the outsiders will not be able to give any idea on cost cutting on travel or communication. All that I can say that many mobile companies have come up with plans where all-India calls are made free.
The second thing about communication is organisation communication. Please check whether there is free flow of information from one department to another or how to transmit information in standardised manner. Therefore, you may focus on standardisation of communication.
The third thing is not about communication per se but about non-communication. Notwithstanding availability of all sorts of means of communication at hand, communication gaps galore. Companies incur huge cost because of non-communication. Occasionally one department is blissfully unaware of what other department is doing ditto living to the adage, left hand does not know what right hand is doing.
In view of the above points, give focus of your presentation on how to create a culture of communication and how to give preference to organisational communication over personal communication. It is much easier said than done!
Thanks,
Dinesh Divekar