CUBE - Cisco Unified Border Element

Cisco Aug 26, 2025

Creates a border to your voice network

Protocol interoperability
address and port translations (address hiding)
consolidated billing and CDR
Centralize bandwidth management
can jump into codec negotiations, or can be transparent

Signaling Protocols

All SIP to SIP works (delayed/early offer)
All H.323 to H.323 works (fast/slow start)
SIP to H.323 matches:
- Early offer to fast start
- Early offer to slow start
- Delayed offer to slow start

Media:

Flow Through - requires DSP resources on CUBE
Flow Around - only signalling goes through CUBE

CUBE Configuration

voice service voip
  allow-connections sip to sip
  allow-connections sip to h323
  allow-connections h323 to h323
  allow-connections h323 to sip
	
  address-hiding

Dial-Peer configuration