All connections between the voicemail server (Pro or Lite) and the IP Office are via the LAN using data channels. The maximum number of data channels that can be used for voicemail operation at any moment are shown below.

Avaya IP Office	Data Channels	Max for VM Light	Max for VM Pro
IP401	2	2	2
IP403	18	4	10
IP406 V1	24	4	20
IP406 V2	40	4	20
IP412	100	4	30
Small Office Edition	Up to 18	4	10

• Voicemail Pro Licenses
  The actual number of ports available on Voicemail Pro is controlled by license keys entered through the Manager application. See License Keys.

  • The Voicemail Pro license enables 4 ports (2 only on IP401).

  • Additional Voicemail Pro licenses can be added to enable further ports up to the maximum shown above.
     

• Data Channels
  The IP Office may support a higher number of data channels. The figures shown above are the maximum that can be simultaneously used for voicemail operation.

  • Note: The IP Office telephone system uses data channels for functions other that voicemail connections. This may reduce the number of data channels available for voicemail.
     

• VoIP/VCM Channels
  Though linked to the IP Office via a LAN connection, voicemail does not use VoIP VCM channels. The Voicemail Server is seen as a device on the IP Office's TDM telephony interface.

  Calls to/from voicemail involving non-IP trunks and extensions do not use VCM channels.

  Calls to/from voicemail from IP trunks and extensions do use a VCM channel.

User, Group and Mailbox Names

The voicemail server creates mailboxes based on the user and hunt group names entered in the IP Office Manager application. Whenever either the voicemail server or the Control Unit restart, new mailboxes are created for any new names found.

This method of operation has the following consequences:

1. WARNING: Mailboxes are based on names
   For all users and groups, if their name is changed, they may no longer be associated with their former mailbox and any associated Voicemail Pro start points.

2. WARNING: Voicemail is case sensitive
   Voicemail is case sensitive. If a mailbox or start point name is entered incorrectly within a Manager or Voicemail Pro, the intended operation will not occur and the call may be disconnected.

3. WARNING: Voicemail removes spaces at the end of mailbox names
   If spaces are left at the end of a mailbox user's name within Manager, when Voicemail creates the mailbox, the space at the end of the name is dropped. When this occurs the mailbox cannot be found as there is a mismatch between the user name and directory.