ChannelRedirect : This is used to redirect the given channel to target dialplan. For example if you want to redirect the channel SIP/1222-09992 to wrap context at 2 priority. You can use this function/command to do so.
This has been added in Asterisk 1.4 version.
For Asterisk 1.4 version
For Asterisk 1.8 and above version
ChannelRedirect(channel, context, extension, priority)
This is used to Sends the specified channel to the specified extension priority.
exten => 100, 1, ChannelRedirect(SIP/satya-00212, ibcall, s, 1)