Cisco Systems 10.x manual Server Assignments and Usage of Voice Messaging Ports

Chapter 4 Configuring Cisco Unity Connection Cluster

Administering a Unity Connection Cluster

Table 4-1	Server Assignments and Usage of Voice Messaging Ports in a Unity Connection Cluster
Integration Type		Server Assignments and Usage of Voice Messaging Ports
Integration by Skinny Client Control		• The phone system is set up with twice the number of SCCP voicemail port
Protocol (SCCP) with Cisco Unified		devices that are needed to handle the voice messaging traffic. (For example,
Communications Manager or Cisco		if 16 voicemail port devices are needed to handle all voice messaging traffic,
Unified Communications Manager		32 voicemail port devices must be set up on the phone system.)
Express		• In Cisco Unity Connection Administration, the voice messaging ports are
		configured so that half the number of the ports set up on the phone system
		are assigned to each server in the cluster. (For example, each server in the
		cluster has 16 voice messaging ports.)
		• On the phone system, a line group, hunt list, and hunt group are configured
		to enable the subscriber server answer most of the incoming calls for the
		cluster.
		• If one of the servers stops functioning (for example, when it is shut down for
		maintenance), the remaining server assumes responsibility of handling all
		incoming calls for the cluster.
		• When the server that stopped functioning is able to resume its normal
		functions and is activated, it resumes the responsibility of handling its share
		of incoming calls for the cluster.
Integration through a SIP Trunk with		• In Cisco Unity Connection Administration, half the number of voice
Cisco Unified Communications Manager		messaging ports that are needed to handle voice messaging traffic are
or Cisco Unified Communications		assigned to each server in the cluster. (For example, if 16 voice messaging
Manager Express		ports are needed to handle all voice messaging traffic for the cluster, each
		server in the cluster is assigned 8 voice messaging ports.)
		• On the phone system, a route group, route list, and route pattern are
		configured to distribute calls equally between both servers in the cluster.
		• If one of the servers stops functioning (for example, when it is shut down for
		maintenance), the remaining server assumes responsibility of handling all
		incoming calls for the cluster.
		• When the server that stopped functioning is able to resume its normal
		functions and is activated, it resumes responsibility of handling its share of
		incoming calls for the cluster.

Install, Upgrade, and Maintenance Guide for Cisco Unity Connection Release 10.x

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