Returns status of the connected channel.
Returns the status of the specified channelname. If no channel name is given then returns the status of the current channel.
0- Channel is down and available.
1- Channel is down, but reserved.
2- Channel is off hook.
3- Digits (or equivalent) have been dialed.
4- Line is ringing.
5- Remote end is ringing.
6- Line is up.
7- Line is busy.
This documentation was imported from Asterisk Version Unknown