A single Server Edition Primary server supports redundant hard disk drives and power supply units. You can also configure Alternate Route Selection.

Add a Server Edition Secondary to provide resilience at any level. The Server Edition Secondary Server provides resilience for the Server Edition Primary Server users, H.323 and SIP extensions, hunt groups, and voicemail without any administration. The Server Edition Secondary server can provide resilience for Avaya one-X® Portal for IP Office.

A Server Edition Expansion System can be backed up to either the Server Edition Primary, Server Edition Secondary, or another Server Edition Expansion System. The dual star Multi-Site Network topology when a Server Edition Secondary Server is present supports diverse routing between all nodes.

For Server Edition Select deployments, IP Office Lines (SCN trunks) can be configured between Server Edition Expansion Systems. Hunt groups can be configured local to the Expansion system and resiliency for hunt groups and phones can be configured, with failover to the Server Edition Primary, Server Edition Secondary, or another Server Edition Expansion System.

At all times, no server hardware is forced to be idle, enabling you decide whether to provide true redundancy, or shared resource resilience.

The IP Office Server Edition Solution provides resilience for supported H.323 phones, SIP endpoints, and DECT R4 deployments. IP Office Lines between systems can be configured to allow control to be automatically passed to a backup IP Office when the home system is not available.

Resilient components

The following components of IP Office Server Edition Solution are resilient:

• IP Office Server Edition

• Voicemail Pro server

• Avaya one-X® Portal server

• H.323 telephones

• SIP endpoints

• DECT R4

• Hunt groups

• Interdevice links

• Trunks

• Incoming Call Routes

• Management

Multisite network

A multisite network enhances resilience by providing the following capabilities:

• Transparency for most of the features

• Resilience of users and hunt groups

• Back up system for Voicemail Pro

• Network topology provides resilience

• None of the hardware is idle

• Simple to activate resilience

Resilient management

You can continue to administer and manage the failure of IP Office Server Edition server and devices in an IP Office Server Edition Solution network through the Server Edition Secondary Server. This provides management without the offline capability, and a facility to realign the configuration after the outages have been resolved. The resynchronization feature highlights the time and source of configuration change and enables the administrator to decide which change set to retain. In addition, you can directly manage each device and application to allow configuration whilst isolated. You can use the resynchronization capability to realign the configurations after the devices are reconnected.