Virtual SNR in Cisco Unified Communications Manager Express

AB.

Please go through the below mentioned link for proper explanation.

Virtual Single Number Reach (SNR) is a feature in Cisco Unified Communications Manager Express (CUCME) that allows incoming calls to be simultaneously routed to multiple devices, such as desk phones, mobile phones, and softphones. When enabled, calls to the virtual SNR number are automatically forwarded to a predefined list of devices until the call is answered or forwarded to voicemail.

Here are the explanations for the two true statements:

A. The SNR DN must be configured as SCCP. This statement is true because the virtual SNR feature in CUCME requires the SNR directory number (DN) to be configured using the Skinny Client Control Protocol (SCCP). SCCP is a Cisco proprietary protocol used for communication between Cisco IP phones and CUCME. When the SNR DN is configured as SCCP, the phone system can correctly identify the device to which a call should be forwarded based on the list of forwarding destinations.

D. The virtual SNR DN must be assigned to an ephone. This statement is true because the virtual SNR DN must be associated with at least one ephone in the CUCME configuration. An ephone is a virtual representation of an IP phone, which can be a physical device or a softphone client running on a computer or mobile device. When an incoming call is routed to the virtual SNR DN, the phone system checks the list of ephones associated with that DN and forwards the call to the first available device.

Here are the explanations for the false statements:

B. Calls cannot be pulled back from the phone associated with the DN. This statement is false because calls can be pulled back from the phone associated with the DN by dialing a specific code. When a user wants to retrieve a call that was forwarded to another device, they can press a button on their phone or dial a code to retrieve the call from the other device. The specific code depends on the configuration of the system.

C. Ephone hunt groups are supported. This statement is false because virtual SNR does not support ephone hunt groups. An ephone hunt group is a feature in CUCME that allows multiple phones to be grouped together to receive incoming calls in a specific order or simultaneously. Virtual SNR, on the other hand, allows incoming calls to be forwarded to a predefined list of devices, regardless of whether they are part of a hunt group.

E. Music on hold is supported for trunk and line side calls. This statement is false because virtual SNR does not support music on hold for trunk and line side calls. Music on hold is a feature that allows callers to listen to music or prerecorded messages while they are placed on hold. However, virtual SNR only applies to incoming calls to the virtual SNR DN, not to calls that are placed on hold on a trunk or line.