[One_Way_Page_Group]
exten => **1,1,SIPAddHeader(Call-Info: Answer-After=0)
exten => **1,2,Page(${One_Way_Paging_List}|)
exten => **1,3,Hangup()


One_Way_Paging_List => SIP/523/&SIP/524&SIP/525




 Extension Changed 522 new state InUse for Notify User 523
 Extension Changed 522 new state InUse for Notify User 524
 Extension Changed 522 new state InUse for Notify User 525
    -- Executing [**1@internal:1] SIPAddHeader("SIP/522-b6d19010", "Call-Info: Answer-After=0") in new stack
    -- Executing [**1@internal:2] Page("SIP/522-b6d19010", "|") in new stack
[Feb  9 11:56:58] WARNING[12811]: app_page.c:130 page_exec: Incomplete destination '' supplied.
    -- <SIP/522-b6d19010> Playing 'beep' (language 'en')
    -- Created MeetMe conference 1023 for conference '341513414d'
    -- Hungup 'Zap/pseudo-1855441182'
  == Spawn extension (internal, **1, 2) exited non-zero on 'SIP/522-b6d19010'
 Extension Changed 522 new state Idle for Notify User 523
 Extension Changed 522 new state Idle for Notify User 524
 Extension Changed 522 new state Idle for Notify User 525