White paper
G900
39
September 2008
importance, however, is that users can still access
the features and functionality of their corporate
communication system, no matter which phone
they are using. G900 can interact with the following
corporate systems:
• A corporate PABX (Private Automatic Branch
Exchange) switch, equipped with a mobile
extension port (like the Ericsson MD110 and
BusinessPhone).
• The mobile centrex service, if provided by the
Operator.
• A telephony server located at the Operator’s or
customer’s premises.
Feature buttons
The user activates corporate features by selecting
commands from a list, which can be dynamically
sent by the server via an IP link, or pre-configured
by the company’s IT manager, the Operator or a
service provider. Each command displays a text
description of the function.
When a command is selected, pre-configured
DTMF tones are used to communicate the desired
function to the server. The phone can even be used
to send data that the user is prompted to provide,
such as the date they will be back from a business
trip. Feature commands and text descriptions have
to be programmed using XML and then imported
into the phone.
Ongoing call features are reached from the active
call view.
Offline commands and corporate telephony
settings can be accessed by pressing the
‘corporate telephony’ icon once a calling card has
been set up. Activating a command will result in an
IP packet being sent to the server.
Routing of corporate calls
If a company uses a PABX switch, calls must be
routed via the PABX to gain access to corporate
features and resources. G900 can route outgoing
calls to the corporate switch, instead of to the
dialled B-party. To complete a call, the B-number
is then sent to the mobile extension port of the
PABX and the call set-up is completed. This
process is completely transparent to the user.
A user may dial either an internal number, such as,
1234, or a public number, like +468 123 4567.
G900 can be set to bypass the switch for certain
types of calls.
Configuring the phone for the
company
The person responsible for the corporate
communication services defines how the phone
shall be configured. This may be the company's IT
manager, the Operator or a service provider. They
define what feature commands shall be displayed
in the phone, how these commands interact with
the PABX switch and what text is displayed. They
also define how G900 shall handle calls to and from
the corporate switch. This is all done in an XML-
structured configuration file, with the extension
.pbx. Once created, this configuration file can be
easily installed onto the G900.
To ensure that only authorized personnel have
access to the PABX, approved mobile phone
numbers are added to the list of mobile extensions
in the PBX, and only these numbers will be able to
use the facilities available.
For more information, see
www.sonyericsson.com/professionalsolutions.
Look for “Areas of use”.