350-801 · Question #498
What are two valid features of Cisco Unified Survivable Remote Site Telephony? (Choose two.)
The correct answer is A. Allows users to make calls with the same dial-plan as if connected to Cisco UCM cluster. D. On a router registers all phones to that remote site router if link to the central Cisco UCM cluster. Cisco Unified Survivable Remote Site Telephony (SRST) ensures remote site call processing continuity during a WAN outage, allowing phones to register to a local router and maintain a familiar dial plan.
Question
What are two valid features of Cisco Unified Survivable Remote Site Telephony? (Choose two.)
Options
- AAllows users to make calls with the same dial-plan as if connected to Cisco UCM cluster.
- BTo get SIP trunk failover capability for Cisco UCM.
- CUsing a Cisco router, it provides failover between these routers to ensure remote site operations.
- DOn a router registers all phones to that remote site router if link to the central Cisco UCM cluster
- EEnables failover between two or more Cisco UCM servers in a cluster if one server is placed at a
How the community answered
(20 responses)- A90% (18)
- B5% (1)
- E5% (1)
Why each option
Cisco Unified Survivable Remote Site Telephony (SRST) ensures remote site call processing continuity during a WAN outage, allowing phones to register to a local router and maintain a familiar dial plan.
SRST's primary goal is to provide call processing continuity during a WAN link failure to the central CUCM. It allows remote site users to make and receive calls with a dial plan that closely mirrors the central cluster's, minimizing disruption.
SRST provides call processing failover for IP phones, not SIP trunk failover for Cisco UCM, which is managed by other redundancy features.
SRST provides call processing to phones during a central CUCM outage; it does not inherently provide failover between SRST-enabled routers themselves.
In the event of a WAN link failure, IP phones at the remote site automatically de-register from the central Cisco UCM cluster and then register with the local SRST-enabled router, which takes over basic call processing for the site.
SRST addresses redundancy for remote sites during a WAN outage to the central cluster, not failover between CUCM servers within the same cluster.
Concept tested: Cisco SRST features and operation
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srst/srst_9_0/overview/cucm_b_srst-90-overview.html
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