Configuration Guide Session Plug-In Language Enterprise SPLs NTT Message Converter Configure the CUCM Facing SIP Trunk Support Options Configure the CUCM Facing SIP Trunk Support Options Configure these SPL options on the CUCM facing sip-interface. To configure the SPL option: Access the sip-interface configuration element. ORACLE# configure terminal ORACLE(configure)# session-router ORACLE(session-router)# sip-interface ORACLE(sip-interface)# Type spl-options +ocNttMsgConverterTagging=opposite and press Enter. ORACLE(sip-interface)# spl-options +ocNttMsgConverterTagging=opposite Type spl-options +dyn-contact-start and press Enter. ORACLE(sip-interface)# spl-options +dyn-contact-start Type done and save your work.