VoIP channels in Asterisk represent connections to the protocols they support. Each protocol you wish to use requires a configuration file, containing general parameters defining how your system handles the protocol as well as specific parameters for each channel (or device) you will want to reference in your dialplan. In this appendix, we’ll take an in-depth look at the IAX and SIP configuration files.
The IAX configuration file (iax.conf)
contains all of the configuration information Asterisk needs to create
and manage IAX protocol channels. The sections in the file are separated
by headings, which are formed by a word framed in square brackets
). The name in the brackets will
be the name of the channel, with one notable exception: the
[general] section, which is not a channel, is
the area where global protocol parameters are defined.
This section examines the various general and channel-specific
settings for iax.conf. We will define each
parameter, and then give an example of its use. Certain options may have
several valid arguments. These arguments are listed beside the option,
separated with the pipe symbol (
bandwidth=low|medium|high means that the
bandwidth option accepts one of the
high as its argument.
You can insert comments anywhere in the
iax.conf file, by preceding the comment text with
the semicolon character (
;). Everything to the right of the semicolon will be ignored. Feel free to use comments liberally. ...