I reckon accent does matter when it comes to sell a product over telephone. I had a call from a call centre in india, the salesman’s accent wasn’t good enough and he pronounced “HURSTVILLE” as “hoorst” “vee” ” lee” rather it had to be pronounced as “hast” “will”. At that moment i felt like indian accent couldn’t be this bad. I think call centre jobs should be given to those aspirants who are having good accent. Believe me it makes a lot of difference when it comes down to selling a product overseas.