Cisco CUBE, CUCM, and Unity Connection

Rooms

1. CUBE is an IOS XE B2BUA

   Cisco Unified Border Element is a B2BUA on IOS XE. It shares the IOS voice stack with other voice features.

2. Dial peers select the SIP next hop

   dial-peer voice N voip, session protocol sipv2, and session target ipv4: name a SIP next hop.

3. voice class sip-profiles

   A voice class sip-profiles rule can add, modify, or remove a header on a named method. Inbound support arrived after Cisco IOS 15.4.

4. Early offer and delayed offer

   Delayed offer means the INVITE has no SDP. voice-class sip early-offer forced makes the outbound dial peer send an offer in the INVITE.

5. CUCM trunks, SIP profiles, and Lua

   A CUCM SIP trunk and a CUCM SIP profile are not the CUBE voice class. Lua normalization scripts exist. MTP required is version-specific.

6. Unity Connection SIP integration

   SIP integration with CUCM is the documented Unity Connection path. Open the guide for your version. This lesson does not make SCCP the default.

7. debug ccsip messages

   debug ccsip messages displays sent and received SIP. Profile decisions have a separate debug, and the analyzer can test a profile offline.

Ecosystem

SIP does not replace workforce management, quality monitoring, CRM, emergency policy, or a messaging registry. It is the session seam those systems hang from. Compliance notes on this page are educational and are not legal advice.

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