Installation guide

132 Planning and Installation Guide ShoreTel 14.2
Planning Applications and Services Call Permissions
8
Call Permissions
The call permissions define what dialed numbers are directed to the Account Codes Service for user
groups configured with account codes. For calls that are redirected to the account codes extension,
the call is completed with the trunk access and call permissions of the Account Codes Service.
This structure imposes two sets of permissions on outbound calls:
 The call permissions for the user group of the user who places the call are used to determine if an
account code must be collected or not.
 The call permissions for the Account Codes Service determine whether calls are finally placed, or
if the intercept tone is to be played.
Distributed Voice Mail
ShoreTel Distributed Voice Mail provides greater availability. Each ShoreTel Distributed Voice Server
(DVS) has an instance of the telephony platform, allowing full functionality of voice mail and auto
attendant services at that location during WAN outages. The Distributed Voice Mail feature allows
users with mailboxes on that server to receive and pick up voice mail messages without having to
depend on a WAN connection to the headquarters server that hosts the configuration database. The
message waiting indicator (MWI) lights correctly update local users about voice mail with or without
WAN connectivity.
Additionally, incoming calls reach the auto attendant, access the dial-by-name directory, and reach
their intended local party during a WAN outage. If a party cannot be reached directly and his call
handling setting would send unanswered calls to voice mail, the call is handled by the local voice mail
server. If the user’s voice mailbox resides on a different voice mail server, the local ShoreTel server will
accept, store, and forward the message when connectivity to the proper voice mail server is restarted.
The caller hears a generic greeting, including the intended party's recorded name, and the caller has
the option to leave a message. This message will be forwarded at a later time to the home voice mail
server for the addressee via SMTP.
Although each voice mail server is autonomous in delivering voice services, it must have connectivity
to the headquarters server in order to carry out configuration changes. Specifically, users on an
isolated remote server are not able to change call handling modes or make other changes that require
modification to the configuration database on the headquarters server.
The ShoreTel Communicator applications may provide limited call control access and may not display
some contents on IP phones at a remote site during WAN outages. These both require connectivity to
the headquarters server for full service. For users who have their ShoreTel Communicator application
running at the time of a WAN outage, graphical access to their voice mail box is provided, including the
ability to compose and playback messages, but ShoreTel Communicator may not display the
corresponding call activity associated with any actions.
You should provision a DVS at any site with more than 100 users to effectively manage your WAN
bandwidth between that site and the headquarters or main site. In addition, you must add a distributed
server with the voice mail application at any site where the required number of mailboxes exceeds
1,000.
Users should be configured for the server that is located at their home or most frequent site. If that site
does not have a server, the nearest server or headquarters server should be used.