Receives one character from channels supporting it.
Receives a character of text on a channel. Most channels do not support the reception of text. Returns the decimal value of the character if one is received, or
0 if the channel does not support text reception. Returns
-1 only on error/hangup.
timeout- The maximum time to wait for input in milliseconds, or
0for infinite. Most channels
This documentation was imported from Asterisk Version GIT-19-56f9c28a50