In extensions.conf add:
exten => 2166242362,1,Queue(support)

In queues.conf add:
[support]
music=default
strategy=roundrobin
timeout=30
retry=5
wrapuptime=15
maxlen=0
announce-frequency=30
announce-holdtime=yes
announce-round-seconds=10
context=operator
member => SIP/119
member => SIP/116
member => SIP/124