Index: vm1chp4-channelconfig.xml
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RCS file: /cvsroot/asterisk/docs/volume-one/vm1chp4-channelconfig.xml,v
retrieving revision 1.2
diff -r1.2 vm1chp4-channelconfig.xml
2a3,21
> 			<sectl>
> 			<title>Introduction to channels</title>
> 			<para>
> 			Channels are how an Asterisk system connects calls together.  They can be
> 			thought of like the wires used by old phone operators that hooked calls
> 			together.  The dialplan (Chapter 5) links these channels together and routes
> 			calls through them.  As all forms of calls create a channel of some sort,
> 			they play a vital role in developing your Asterisk installation.
> 			</para>
> 			<para>
> 			Channels come in all kinds of different formats from analog phone lines
> 			from your telephone company (FXO, FXS, PRI, BRI) to completely IP 
> 			(SIP, IAX, etc).  Asterisk transforms all of these channels into a kind of
> 			pipe for your call to flow through, and the pipes are connected together.
> 			It is important to remember that even though channels may vary in terms of
> 			technology and delivery, they are all just a channels, and channels can be
> 			connected to make a call.
> 			</para>
> 			</sectl>
5a25,40
> 			Foreign eXchange Station (FXS) channels are what your phone company provides
> 			to the wall of most homes or small businesses.  It is the traditional flat
> 			analog telephone line.  Since they provide dialtone, Asterisk can use an FXS
> 			channel to hook a basic analog phone set to the system to use for making and
> 			recieving calls.  If you have a Digium card that can provide an FXS channel,
> 			like the TDM400P,  it can be configured like:
> 			</para>
> 			<informalexample>
> 			In the zapata.conf we set up the channel:
> 			<programlisting>
> 			language=en
> 			context=default
> 			switchtype=national
> 			signalling=fxo_ls ; This is the signaling we're recieving not the one we're
> 			                  ; providing	
>