User's Manual

VAIO® Computer Wireless Information

❑ GPRS Network

Question: Why do I see a network connection speed rate of 214.4 Kbs, but

when I try to access a website that requires a minimum of 128 Kbs, I am told

that I do not have the required inimum rate.

Answer: The network speed indicator provides the capacity of the wireless

device is 214.4 Kbs but the actual speed depends on network throughput. To

work around this, try to change the network settings to optimize the

GPRS/EDGE value. This is done by accessing CCM --> Tools -->

Settings… --> Advanced Networking, and then selecting “Optimized

GPRS/EDGE value” option form the RWIN variables window.

Question: I am experiencing dropped connections, slowness, and other

difficulties while attempting to stream video over the Cingular GPRS

connection. What could be the problem?

Answer: Bandwidth over the Cingular GPRS network is somewhat

restricted as compared to wired or 802.11x wireless connection types. Due to

the demanding nature of streaming audio/video, it is not recommended that

GPRS be used for either streaming video, or very large data downloads.

Question: I am experiencing difficulty reconnecting to my web browser

when switching from the Cingular GPRS network to a WLAN connection.

What could be the problem?

Answer: The network behind the WLAN’s Access Point may be set up to

use a proxy server. If this is the case, proxy settings entered for Internet

Explorer over WLAN may prevent IE from connecting over a GPRS link.

To allow web browsing from either connection type:

1 Correctly configure IE proxy settings for use over the WLAN

connection. Then, open the Cingular Connection Manager and right-

click the “GSM” tab. Select “profiles” and then click on the “Edit”

button.

2 Under the “General” tab, make certain that the “Disable IE’s manual

proxy settings on connect” checkbox has been enabled. Close the “Edit”

screen and then close and reopen Internet Explorer. Remember to close

and reopen IE each time you switch connection types in order to refresh

proxy settings within Internet Explorer.