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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.

Learn in 5 minutes

  1. Name CUBE as Cisco Unified Border Element
  2. Place it in the B2BUA role
  3. Treat IOS voice behavior as release-specific

Visual

CUBE between the phone and the carrier · study drawing · cyphermonkeylabs.com AliceSBCBob INVITE 100 INVITE 180 180 200 200 ACK

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Basic SIP configuration and SIP profiles are separate chapters of the same product.

Worked example

Walk a CUBE call Play the ladder and name the B2BUA hop.

  1. Play the call.
  2. Find 203.0.113.20.
  3. Separate the caller dialog from the carrier dialog.

Vendor menus, ports, and license names change. Confirm before relying on a sentence that is not an RFC.

Fault

The carrier packet has a new Call-ID. The review calls the call broken because Alice’s Via is gone.

Call-ID b2bua-legb-01@example.com belongs to the outbound dialog.

Quiz

CUBE expands to


CUBE’s SIP role is


The 17.6 and later profile chapter cited here is


CUBE shares


ip address trusted list is documented in


Inbound profile history in the use-case technote starts


Ecosystem

Glossary, sister systems, and the integration seam for this room.

Workforce management WFM forecasts volume and builds schedules. It consumes contact-center events. It does not parse Via headers. When a forecast is wrong, the SIP symptom is usually queue delay and 480 or carrier congestion, not a broken dialog ID.

Glossary · Ecosystem map · Ports · Troubleshooting

Sources and go deeper