300-070 · Question #45
Which three are functions of Cisco Unified Border Element? (Choose three.)
The correct answer is B. H.323 and SIP interworking D. transcoding E. phone proxy. The Cisco Unified Border Element (CUBE) is a router-based SIP/H.323 session border controller. Its core functions include: (B) H.323 and SIP interworking - CUBE can translate signaling and media between H.323 and SIP endpoints, enabling protocol interoperability. (D)…
Question
Which three are functions of Cisco Unified Border Element? (Choose three.)
Options
- Aclient registration
- BH.323 and SIP interworking
- CLync interworking
- Dtranscoding
- Ephone proxy
- Fmobile and remote access
How the community answered
(68 responses)- A3% (2)
- B88% (60)
- C7% (5)
- F1% (1)
Explanation
The Cisco Unified Border Element (CUBE) is a router-based SIP/H.323 session border controller. Its core functions include: (B) H.323 and SIP interworking - CUBE can translate signaling and media between H.323 and SIP endpoints, enabling protocol interoperability. (D) Transcoding - CUBE can invoke DSP resources to convert audio codecs (e.g., G.711 to G.729) when endpoints cannot agree on a codec. (E) Phone proxy - CUBE supports phone proxy functionality, allowing remote IP phones to register securely through a firewall by acting as a media and signaling proxy. Client registration (A) is a gatekeeper or CUCM function. Lync interworking (C) and mobile/remote access (F) are primarily Cisco Expressway functions.
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