[Asterisk-Users] 5ESS central office question

[Rich Adamson]

Anyone have a practical experience/knowledge relative to why a 5ESS 
central office switch would require a "w" in the Dial statement to 
handle analog pstn-fxo calls? 

I fully understand what "w" is doing, just trying to better understand 
why a 5ESS doesn't accept dtmf a little quicker then it does. Does
that switch make use of dtmf receiver cards (or something) that
might involve a delay in attaching it to an analog pstn line?

Rich