extensions.conf

[agentext]
exten => _1XX,1,Set(GROUP(${EXTEN})=CALL_LIMIT)
exten => _1XX,n,GotoIf($[${GROUP_COUNT(CALL_LIMIT@${EXTEN})} > 1]?BLOCK)
exten => _1XX,n,Set(status=${DB(paused/${EXTEN})})
exten => _1XX,n,GotoIf($["${status}" = "paused"]?BLOCK)
exten => _1XX,n,Dial(SIP/${EXTEN},15)
exten => _1XX,n,Busy
          
exten => _1XX,n(BLOCK),Busy


queues.conf
memeber => Local/117@agentext