here are examples
http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-border-element/99863-cube-config.html
http://www.cisco.com/c/en/us/support/unified-communications/unified-border-element/products-configuration-examples-list.html
http://docwiki.cisco.com/wiki/Cisco_Unified_Border_Element_SIP_Trunk_Configuration_Example
and dont forget to rate post