Overview

The device's Cloud Resilience Package (CRP) application enhances cloud-based or hosted communications environments by ensuring survivability, high voice quality and security at enterprise branch offices and cloud service customer premises. CRP is designed to be deployed at customer sites and branches of:

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Cloud-based and hosted communications

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Cloud-based or hosted contact-center services

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Distributed PBX or unified communications deployments

The CRP application is based on the functionality of the SBC application, providing branch offices with call routing and survivability support. CRP is implemented in a network topology where the device is located at the branch office, routing calls between the branch users, and/or between the branch users and other users located elsewhere (at headquarters or other branch offices), through a hosted server (IP PBX) located at the Enterprise's headquarters. The device maintains call continuity even if a failure occurs in communication with the hosted IP PBX. It does this by using its Call Survivability feature, enabling the branch users to call one another or make external calls through the device's PSTN gateway interface (if configured).

For cloud providers, CRP ensures uninterrupted communications in the event of lost connection with the cloud providers’ control systems. For distributed enterprises and contact centers, CRP is an essential solution for enterprises deploying geographically distributed communications solutions or distributed call centers with many branch offices. CRP ensures the delivery of internal and external calls even when the connection with the centralized control servers is lost.

Key Features

Survivability	Quality of Experience/Service	Security
■ PSTN fallback ■ WAN redundancy ■ Local mode ■ High availability ■ Emergency calling (E911) ■ Basic call routing between registering users and device, or any other route to responding server ■ Short number dialog (short numbers are learned dynamically in the registration process) ■ Survivability indication to IP phone ■ Call hold and retrieve ■ Call transfer (if IP phone initiates REFER) ■ Basic Shared Line Appearance (excluding correct busy line indications) ■ Call waiting (if supported by IP phone)	■ QoE monitoring ■ Call Admission Control ■ SLA fulfillment ■ SIP mediation ■ Media transcoding ■ Test call agent	■ Layer 3 to 7 protection ■ Media encryption ■ Call control encryption ■ NAT traversal ■ Topology hiding

One of the main advantages of CRP is that it enables quick-and-easy configuration. This is accomplished by its pre-configured routing entities, whereby only minimal configuration is required. For example, defining IP addresses to get the device up and running and deployed in the network.