Cisco IP Phone 7940 SIP 정보

http://www.voip-info.org

Cisco 7940/7960 IP Phone (SIP) Configuration
http://www.mollien.net/index.php?main=articles&article_id=10

Converting a Cisco 7940/7960 CallManager Phone to a SIP Phone and the Reverse Process
http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a0080094584.shtml

Setup SiP on 7940 - 7960
http://www.voip-info.org/wiki/view/Setup+SiP+on+7940+-+7960

Cisco 7940/7960 SIP with BroadVoice
http://www.voip-info.org/wiki/index.php?page=Cisco+7940%2F7960+SIP+with+BroadVoice