Corporate Telephony - Sony Ericsson P900 White Paper

Phone and PIM Applications

Corporate Telephony

P900 as a Corporate Telephone
Corporations have traditionally used wire phones and DECT phones in the office. There is now a strong shift
towards GSM. Of prime importance to corporations is the ability to use the features of the corporate switch.
The P900 is by virtue of its pen and large screen particularly well suited for this. P900 has special
functionality for working together with corporate switches, equipped with mobile extension facilities, like
Ericsson's MD110 ® and Business Phone®. It can also work with callback servers and other phone servers
accepting tone input.
The P900 offers GSM mobility and user friendly access to corporate switch features. The user can change
work mode via an icon in the status bar.
The functionality is realised using the calling card feature of the P900. This means that the call is not routed
to the B-party directly but to the corporate switch, and the B-number is then sent as a DTMF tone string to
the switch.
A user may dial either an internal number, e.g. 71234 or a public number, e.g. +468 123 4567. The internal
number will be signalled as it is to the corporate switch mobile extension port. A public number will be
equipped with the external line prefix, used by the corporate switch before being sent. A plus sign '+' will be
replaced by the international prefix used by the switch. Public numbers that lie within the number series of
the switch will be truncated, and only the internal number will be sent. This is in order to speed up call
establishment.
The user activates features at the corporate switch by pressing feature buttons. Each feature button sends a
string of tones, and can even include data that the user is prompted to provide.
The three most used features can be
displayed during ongoing calls.
Additional call features are displayed
on a list under the More button.
The company's IT manager defines the feature buttons and how the P900 should handle calls from and to
the corporate switch. This is done in an XML-structured configuration file, with the extension '.pbx'. These
files can be published on the corporate web site or e-mailed to users.
P900/P908 White Paper, December 2003
Offline commands are displayed under the 'corporate'
status bar button. The offline commands will, if used in
standby mode, result in a call being made to the PBX.
The call may be cleared immediately after tone
sending, if this is specified.
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