If you're being paid by your employer to attend meetings, 
  what phone call could possibly be so important that you 
  can't let it go to voicemail and you get to it after the 
  meeting?

Do you remember a few months ago when Amazon's EC2 had problems and took down Quora, Pintrest, Heroku and that lot? [1] Or when Knight Capital managed to lose $440 million in 45 minutes due to a software glitch? [2]

What meeting could possibly be so important that you can't postpone it to deal with a critical production issue?

[1] http://www.forbes.com/sites/anthonykosner/2012/07/01/survey-... [2] http://www.guardian.co.uk/business/nils-pratley-on-finance/2...