把下面文本的124.237.78.27替换为指定IP
//-----------------------------------------------------
MEDIA=rastapi
Port=6588
Device=WAN Miniport
PhoneNumber=124.237.78.27
AreaCode=
CountryCode=86
CountryID=86
UseDialingRules=0
Comment=
FriendlyName=
LastSelectedPhone=0
PromoteAlternates=0
TryNextAlternateOnFail=1