Field Sales Is Dead; Long Live Inside Sales

The modern salesperson spends the greater proportion of their selling time on the phone, not in the field.

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Because almost all of your marketing and sales activity is performed by an inside team, you don’t need regional sales offices, you don’t need layers of management, and you don’t need a team of operations people to process expense reports and adjudicate border skirmishes between over-caffeinated commissioned salespeople.
The death of field sales does not mark the end of field salespeople. They still exist, and they always will. What it does mark is the beginning of a new era, where sales is essentially an inside function.
http://blog.hubspot.com/sales/the-death-of-field-sales