Sony Ericsson Sonyericsson P800 Manual

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Remote Synchronisation 
 
Remote synchronisation takes place over the air using HTTP and is the ideal way to keep the 
P800 up to date. Using GPRS, the P800 can be continuously connected to the remote 
synchronisation server. 
 
Synchronisation services will be offered by mobile operators, third-party service providers and as 
added capability to corporate PIM applications. Corporate PIM applications such as Microsoft
® 
Exchange and Lotus® Notes® can be...

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White Paper, January 2003 
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Automatic synchronization 
Synchronisation can be configured to start automatically, given that a suitable synchronization 
program must be running on the other device: 
• 
When the USB cable is plugged in to the P800. 
• When the P800 is placed in to the desk stand, and the desk stand is connected to the 
other device. 
• When Bluetooth is activated on both devices and they come into operating range 
• 
When infrared is activated on both devices and the...

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White Paper, January 2003 
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Typical uses for this include: 
• Archiving pictures taken on the P800 to PC storage 
• 
Moving images to the P800 to use in personalisation, MMS messages etc. 
• Moving sound clips to the P800 for personalisation. 
• 
Store work documents (Word, Excel etc) on the P800 to read whilst on the move. 
 
Backup and Restore 
 Backup is initiated from the connected PC. Note that the Syncstation desk stand must be used 
for backup and not infrared or Bluetooth...

         P800/P802
 
White Paper, January 2003 
94
Object Exchange – ‘Send As’ 
 
The P800 makes it possible to transfer objects over Bluetooth, infrared and Messaging. This is 
presented to the user via ‘Send As’ commands in applications. Simply select an item such as a 
contact, select ‘Send As’ and select the method to be used for sending. Typical applications are 
to beam an appointment to other people, or to receive a new background image. 
 
Bearer >
Application (Data Type) IR Bluetooth SMS  MMS...

         P800/P802
 
White Paper, January 2003 
95
GPRS, HSCSD and CSD Connections 
 
The introduction of GPRS (General Packet Radio Services) is one of the key steps in the 
evolution of today’s GSM networks for enhancing the capabilities of data communication. Data 
traffic is increasing enormously (over both wired and wireless networks), with the growth in 
demand for Internet access and services paralleling that for mobile communications. Users want 
access to the Internet while they are away from...

         P800/P802
 
White Paper, January 2003 
96  
 
 
 
Once paired with a Bluetooth-enabled laptop, the P800 is ready to make an immediate connection to 
the Internet or corporate network. Because Bluetooth is wire-free and requires no line-of-sight 
alignment, laptop can be positioned for maximum comfort whilst the P800 can remain in a jacket 
pocket, briefcase or even be placed up to 10 metres away to get optimal reception. 
 
 
 
 
Infrared may also be used to link the P800 with other devices....

         P800/P802
 
White Paper, January 2003 
97
Technical Explanation of CSD, HSCSD and GPRS 
 
This section provides an overview of the way data communication works in a GSM network 
environment. This will help you to understand the characteristics of the different solutions 
supported by the P800 and the parameters which govern the data transmission speeds available. 
 
Circuit Switched Data (CSD) 
A modem and landline is a common way to connect to the internet and company networks. The modem...

         P800/P802
 
White Paper, January 2003 
98
wireless RS232 cable. The modem makes a PSTN or ISDN call to the Point Of Presence 
telephone number of the required resource, for example your Internet Service Provider or 
company modem pool for intranet access.  Since the modem in the GSM network operates to 
common standards, no special configuration is required at the ISP or company remote access 
servers. The limitation on transmission speed (9.6kbps or 14.4kbps) is due to the lower 
bandwidth of...

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White Paper, January 2003 
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In the above example, terminal A is a phone using one timeslot for a voice call, terminal B is a 
P800 using one timeslot for a CSD data call and terminal C is a phone using one timeslot for a 
CSD WAP session. In each case, the timeslot is allocated whether data is transmitted or not. 
 
In order to achieve higher data rates, the GSM terminal may be allocated more timeslots within 
the transmit and receive channels. Since common applications such as...

         P800/P802
 
White Paper, January 2003 
100
 
Here is a summary of the slot usages in HSCSD. One ‘uplink’ and 1 to 2 ‘downlinks’. 
 
Analogue and ISDN (V110) Bearer Service Types 
CSD and HSCSD are capable of Analogue and, where supported by the mobile operator, ISDN 
connections. ISDN offers faster call set-up time and can increase the performance of an HSCSD 
connection due to the limitations in analogue modem technology. The simplest option is to test 
ISDN bearer mode, and switch to analogue...