Depends on the type of consulting firm, and the type of consulting work. Consulting firms can run the gamut from boutique firms that specialize in sales training or telecom (where perhaps your skills are valued), to IT, Big 4, strat houses, and everything else in between.
Also, when you say Sales Exec for a Telco, do you mean "Nokia Account Manager for Verizon" (not really a sales job, more a relationship manager), or do you mean "California District Manager for Verizon" (responsible for day-to-day sales for 500 mobile phone retail stores), or ??? Again, type of firm that will be interested in you will depend on what it is you're doing exactly.
Finally, where did you get your MBA? Depending on the type of firm you want to get into, your school may/may not be important.