Half Duplex And Msn Messenger

[zillah]

Dear All

Half duplex, means we cann't transmit and receive at the time, it should either send or receive, it can not be both at same the moment.

Now with MSN messenger or Yahoo, why cann't we talk at the same time? Is it because of half duplex technique? or something elase?

Thank.

I am using ADSL connection with 256 kpbs with wireless NIC card

and normal dialup.

OSs is are windows 2000 Pro and WinXP Pro.

[zillah]

Any help about this issue