Which powerful tool supports Element Grouping, Time of Day routing, and Call Admission Control?

Cisco Unified Border Element (CUBE) is a powerful Session Border Controller (SBC) feature set on Cisco routers. It is specifically designed to provide advanced session management and routing at the network edge. CUBE directly supports Element Grouping through the configuration of server groups for SIP trunks, enabling load balancing and failover. It implements Time of Day (ToD) routing by applying time-range policies to dial peers. Furthermore, CUBE enforces Call Admission Control (CAC) by setting limits on the number of concurrent sessions, either globally or on a per-dial-peer basis, to protect network resources and maintain call quality.

A. VGW: This is a generic term. CUBE is a specific feature set running on a Voice Gateway platform, making "CUBE" the more precise and correct answer.
B. CUSP: The Cisco Unified SIP Proxy is designed for large-scale SIP routing and aggregation, but it lacks the comprehensive SBC functionalities like media handling and advanced CAC found in CUBE.
D. CUCM: While Cisco Unified Communications Manager (CUCM) supports versions of these features (e.g., Route Groups, Time Schedules, Location-Based CAC), CUBE is the specialized tool for applying this specific combination of controls at the network edge for service provider interoperability.

1. Cisco Unified Border Element Configuration Guide

Cisco IOS XE 17.x - Time-of-Day Routing: This document details the configuration of Time-of-Day (ToD) routing on CUBE using time-range commands applied to dial-peer configurations. (See "Information About Time-of-Day Routing" section).

2. Cisco Unified Border Element Configuration Guide

Cisco IOS XE 17.x - Call Admission Control: This guide explains CUBE's multiple methods for CAC

including setting a maximum number of connections on a dial peer (max-conn) or globally for the router. (See "Call Admission Control on Cisco Unified Border Element" chapter).

3. Cisco Unified Border Element Configuration Guide

Cisco IOS XE 17.x - SIP-to-SIP Connections on CUBE: This document describes the use of server groups for outbound dial peers

which allows for grouping destination SIP servers

a form of Element Grouping for trunk management. (See "Configure SIP-to-SIP Server Groups in a Dial Peer" section).

4. Cisco Unified Communications Manager System Configuration Guide

Release 12.5(1)SU1 - Call Admission Control: This guide describes CUCM's location-based CAC

which is functionally distinct from the session-based CAC typically implemented on CUBE at the network edge. (See "Call Admission Control" chapter).