essages to pass through CUBE end-to-end without modification. 6. This command must be enabled at a global level to maintain integrity of SIP signal- ing between the AT&T network and CUCM. This command enables CUBE to negotiate all flavors of the G.729 codec and must be configured to interoperate seamlessly with AT&T's network. This command enables multiple codec support and performs codec filtering required for correct interoperability between AT&T's SIP network and CUCM. 196 SIP Trunking 9. This SIP profile expands the Diversion header number from a four-digit extension to a full ten-digit DID number to obtain interoperability with users on certain AT&T network service offerings during call-forward call scenarios. 10. Inside interface facing CUCM. 11. Outside interface facing AT&T Flexreach network. 12. These commands configure DSP resources for CUCM conferencing. 13. This is the dial-peer routing calls from the enterprise CUCM to AT&T. To configure a redundant outgoing dial-peer toward a second (backup) AT&T border element, create a second dial-peer with the same configuration values, except set the session target to the backup AT&T border element's IP address, and set the preference command under both dial-peers as appropriate (load balancing or primary/secondary). 14. This command frees up payload type value 100 to assign it to RFC-2833 DTMF (nte). 15. This command assigns payload type value 100 to nte (RFC-2833 DTMF). 16. Assigns voice class codec 1 settings to the dial-peer (codec support and filtering). 17. This command enables delay offer (DO) to early offer (EO) conversion for the initial SIP INVITE message of calls matched by this dial-peer. 18. This command enables the SIP profile 1 conversion given earlier in the configuration for calls matching this dial-peer. 19. This command sets the SIP target IP address for outgoing calls. 20. This command assigns dial-peer properties to incoming calls matching this called number. 21. This command enables DTMF relay using RFC-2833 for calls matching this dial-pee