just a quick question, whats the difference between the Nec ND 3520 and same model but with letter A on the end. Ive seen there are 2 models on the market 1 3520 and 1 3520A?
Please can anyone tell me the difference.
If there is a difference, it ain't much.
For the 3540 you just ignore the letters, think it's the same for the 3520.