[asterisk-users] "real life" example of SLA definition

[Thomas Kenyon]

Steve Langstaff wrote:
> 
> Kevin - can you give a quick description of what shared lines are (as
> opposed to shared extensions)?

This is all rather confusing.

Can I use SLA/BLA to arrange it so that 2 SIP clients (an AT-320 and an 
e60) respond to the same extension, but if one is in use then the other 
one will return as busy when a call is passed to the extension?