[Asterisk-Users] sharing a line w/multiple extensions

[Robert La Ferla]

Let me revise this a little:

I'd like to configure Asterisk so an incoming call from one POTS line is 
shared amongst multiple extensions - both SIP and analog.  i.e.  If one 
SIP phone answers the call, another SIP or analog extension phone can 
pick up and join the conversation.  How do I configure this?  Is it all 
in extensions.conf?