Microsoft Windows [Version 6.0.6001] (C) Copyright 2006 Microsoft Corp. c:\windows>netsh ras diagnostics set modemtracing ?
set modemtracing [ state = ] ENABLED|DISABLED
Enables or disables tracing of modem settings and messages during a network connection.
state - tracing state of modem
ENABLED - Enables modem tracing for all network connections that use a modem.
DISABLED - Disables modem tracing for all network connections that use a modem.
NETSH / RAS / DIAGNOSTICS / SET / MODEMTRACING
netsh ras diagnostics set modemtracing - Windows Vista - commandEnables or disables tracing of modem settings and messages during a network connection. / Windows Vista netsh, ras, diagnostics, set, modemtracing, cmd, command, Windows, Vista