1. Use the show ephone-hunt command
http://cisco.biz/en/US/docs/voice_ip_comm/cucme/command/reference/cme_s1ht.html#wp11078232. You can use the sequential hunt-group type - "Hunt group in which extensions ring in the order in which they are listed, left to right, when the hunt group was defined."
voice hunt-group 4 sequential
final 3011
list 3019,3010
timeout 12
pilot 3019