Sony Ericsson GC89 - Manual (Page 105)

Appendix A - Connection Parameters 105
If you have previously optimised TCPWindowSize, for example, as directed by a broadband internet
service provider, then check whether that setting is global or specific to the network adaptor over
which the broadband connection is made. It is preferable that all TCPWindowSize settings are
specific to the network adaptor involved, since this ensures that each individual connection is
correctly optimised.
In some cases it is necessary to set TCPWindowSize globally. Further information and a utility to do
this is available at www.SonyEricsson.com/support.