Cisco Unity Connection

Cisco Unity Connection deployment in HA mode.

There are few basic task that need to be done in the unity connection to create a cluster  in HA.These are the high level steps that needs to  be done.

Add a Unity Connection Subscriber to the Unity Connection Subscriber from the Cluster Config

Install the unity connection  and follow the wizard for secondary node and enter the primary server details

Create separate SIP trunk in CUCM for the Second Unity Connection and add it to existing route group for Voicemail

Choose the required Trunk selection algorithm in Route Group

Enable Access Alert Logg

Next step is to understand the Licensing ...

On the Licensing part we need to assign license port separately to each server Do the License port allocation as per the design,The option can be found from Telephony Integrations >  Port of Cisco Unity Connection Administration.

Below is the list of setting available :

Field	# Considerations
Enabled	Check this check box to enable the port. The port is enabled during  normal operation. Uncheck this check box to disable the port. When the port is disabled,  calls to the port get a ringing tone but are not answered. Typically,  the port is disabled only by the installer during testing.
Server Name	(For Cisco Unity Connection clusters only) Click the name of the Cisco Unity Connection server that you want to  handle this port. For details, see Chapter 7,  "Configuring Voice Messaging Ports for a Cisco Unity Connection  Cluster."
Extension	Enter the extension for the port as assigned on the phone system.
Answer Calls	Check this check box to designate the port for answering calls. These  calls can be incoming calls from unidentified callers or from users.
Perform Message Notification	Check this check box to designate the port for notifying users of  messages. Assign Perform Message Notification to the least busy ports.
Send MWI Requests	Check this check box to designate the port for turning MWIs on and off.  Assign Send MWI Requests to the least busy ports.
Allow TRAP Connections	Check this check box so that users can use the phone as a recording and  playback device in Cisco Unity Connection web applications. Assign Allow  TRAP Connections to the least busy ports.
Outgoing Hunt Order	Enter the priority order in which Cisco Unity Connection will use the  ports when dialing out (for example, if the Perform Message  Notification, Send MWI Requests, or Allow TRAP Connections check box is  checked). The highest numbers are used first. However, when multiple  ports have the same Outgoing Hunt Order number, Cisco Unity Connection  will use the port that has been idle the longest.
Security Mode	Click the applicable security mode: • Non-secure—The  integrity and privacy of call-signaling messages will not be ensured  because call-signaling messages will be sent as clear (unencrypted) text  and will be connected to Cisco Unified CM through a non-authenticated  port rather than an authenticated TLS port. In addition, the media  stream will not be encrypted. • Authenticated—The  integrity of call-signaling messages will be ensured because they will  be connected to Cisco Unified CM through an authenticated TLS port.  However, the privacy of call-signaling messages will not be ensured  because they will be sent as clear (unencrypted) text. In addition, the  media stream will not be encrypted. • Encrypted—The  integrity and privacy of call-signaling messages will be ensured on this  port because they will be connected to Cisco Unified CM through an  authenticated TLS port, and the call-signaling messages will be  encrypted. In addition, the media stream will be encrypted.

Regarding the licensing part you need to have license port divided between the two unity connection servers


 What will be the behaviour when both Cisco Unity Connection Servers Are Functioning Normally
•The phone system is provisioned with  twice the number SCCP voice mail port devices needed to handle the voice  messaging traffic.

•A hunt group is configured to send  incoming calls first to the subscriber server, then to the publisher  server if no answering ports are available on the subscriber server.

•Both Cisco Unity Connection servers are  active and handle voice messaging traffic for the system.

•In Cisco Unity Connection  Administration, the voice messaging ports are assigned in the following  manner:

–The subscriber server answers most  incoming calls for the system.

–The publisher server handles most  dial-out calls (MWI requests and notifications).

This guide directs you to assign the voice messaging ports to their  specific Cisco Unity Connection server at the applicable time.

•The voice messaging ports on both  Cisco Unity Connection servers are registered with the phone system.

•The number of voice messaging ports  that are assigned to one Cisco Unity Connection server must be  sufficient to handle all of the voice messaging traffic for the system  (answering calls and dialing out) when the other Cisco Unity Connection  server stops functioning.

If both Cisco Unity Connection servers must be functioning to handle the  voice messaging traffic, the system will not have sufficient capacity  when one of the servers stops functioning.

•Each Cisco Unity Connection server is  assigned half the total number of voice messaging ports.

If all the voice messaging ports are assigned to one Cisco Unity  Connection server, the other Cisco Unity Connection server will not be  able to answer calls or to dial out.

•Each Cisco Unity Connection server must  be assigned voice messaging ports that will answer calls and that can  dial out (for example, to set MWIs).