Name
GROUP — Associates the channel into a set group
Synopsis
GROUP([category])
Gets or sets the channel group.
; Permit only one user to access the paging system at once.
exten => 8000,1,Set(GROUP()=pager)
exten => 8000,n,GotoIf($[${GROUP_COUNT(pager)} > 1]?hangup)
exten => 8000,n,Page(SIP/101&SIP/102&SIP/103&SIP/104)
exten => 8000,n(hangup),Hangup