An engineer is ensuring that each SIP-based element within a network has a component to route call activities to. Which virtual Cisco UCS server component is effective in reducing the number of call routing combinations while also simplifying SIP network design and troubleshooting?

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B. Cisco Unified SIP Proxy Cisco Unified SIP Proxy (CUSP) runs as a virtual application on Cisco UCS and serves as a centralized SIP routing proxy, meaning each SIP element only needs a single route to CUSP rather than direct routes to every other SIP element. This hub-and-spoke model dramatically reduces routing table complexity and simplifies troubleshooting by providing a single point of SIP signaling inspection.

Answer

A. PBX A PBX is a traditional or IP-based telephony switching system for a premises, not a virtual UCS component designed specifically to reduce SIP routing combinations.

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C. VG Gateway A VG Voice Gateway provides connectivity between the PSTN or analog devices and IP telephony networks, and does not function as a centralized SIP routing proxy.

Answer

D. SRST SRST (Survivable Remote Site Telephony) provides fallback call processing for remote sites during WAN outages and has no role in centralizing or simplifying SIP routing topology.

An engineer is ensuring that each SIP-based element within a network has a component to route call activities to. Which virtual Cisco UCS server component is effective in reducing the number of call…

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