[Asterisk-Users] Simple dialplan question for sip

[chouck]

How can you set sip accounts into groups?  And also, when you dial a group 
such as Zap/g1 how can you change the behavior of the calling?  Can you make 
it force all phones in that group to ring at once?  Also if sip accounts 
cant be set in groups is there any other simple trick to force a ring on all 
of them without adding a new &sip/act1&sip/act2 for each one added?  Thanks 
in advance

-Chad