Nokia 9500 Data transmission, Noise, Roaming, Electrostatic discharge, Dead spots and dropouts

22.Data transmission

This device employs the data transmission capabilities of the GSM and WLAN networks to send multimedia messages, short messages and e-mail, and to establish connections with remote computers, for example.

Wireless data connections can be made from most locations where your device operates, but it is recommended that you move the device to a location where the strongest possible wireless signal can be obtained. When the signal is strong, data transmission is efficient. Wireless data communications may perform differently from data communications transmitted over wires. This is due to the inherent characteristics of the wireless environment. Wireless connections may experience "noise", low or lost signals, and distortions.

Noise

Radio interference from electronic appliances and equipment, as well as from other phones may affect the quality of wireless data transmission.

Roaming

As the device user moves from one network cell or WLAN access point coverage area to another, the signal strength of the channel may drop. The network may hand over the user to a coverage area and frequency where the signal is stronger. Network roaming may also occur when the user is stationary, due to varying network traffic loads. Such roaming may cause slight delays in transmission.

Electrostatic discharge

A discharge of static electricity from a finger or a conductor may cause erroneous functions in electrical devices. The discharge may result in distorted display and unstable software operation. Wireless connections may become unreliable, data may become corrupted, and transmission halted. In this case you need to end the existing call (if any), switch off the device (if on) and remove the battery. Then replace the battery and establish a new wireless connection.

Dead spots and dropouts

Dead spots are areas where radio signals cannot be received. Dropouts occur when the device user passes through an area where the radio signal is blocked or reduced by geographical features or large structures.

Signal impairment

Distance and obstacles can cause signals to become out-of-phase. They can also cause reflected signals. Both situations result in a loss of signal strength.

Low signal strength

Due to either distance or obstacles, the radio signal strength from a WLAN access point or a cell site may not be strong enough or stable enough to provide a reliable data connection for communication. Therefore, to ensure the best possible communication, remember the following points:

•The data connection works best when the device is in a stationary position. Attempting wireless data communication while in a moving vehicle is not recommended.

•Do not place the device on a metal surface.

•Check on the device display that the signal strength is sufficient. Moving the device within a room, especially towards a window, may result in a stronger signal. If a signal is not strong enough to support a voice call, data connection should not be attempted until you can find a location with better signal reception.

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