[Asterisk-Users] 2 Questions

[Ben Price]

Question 1:
If I am going to be selling hardware phones to the enduser do there 
accounts have to be SIP or can they still be IAX (I find IAX is better 
for firewalls)?

Question 2:
Is there a way to limit connections?  For example, extension 7895483 can 
only have 1 call in progress at a time (either incoming OR outgoing).  
And if so, is there a way to change this limit on a per extension 
basis?  (I want to be able to sell more connections at a small rate)

Thanks in advanced,
Ben