The second section of Figure E.3 shows that modem data compression (MNP5, V.42 bis) standards take effect only between modems (DCE-to-DCE link). For RAS versions 1.0 and 1.1, these standards are not supported. However, if you are using RAS version 1.1a or later, you should activate modem compression (along with hardware flow control) if you are calling a Windows for Workgroups 3.11 or Windows NT RAS server. You should not activate modem compression if you are calling a RAS 1.0 or 1.1 OS/2 version 1.3 server with LAN Manager 2.1 or later. For more information, see the footnote 5 following Figure E.3.