Add an explaination of how to escape things in ppps chat script.

svn path=/head/; revision=2263

FAQ/network.sgml

@@ -1,4 +1,4 @@
-<!-- $Id: network.sgml,v 1.3 1997-12-14 22:20:38 alex Exp $ -->
+<!-- $Id: network.sgml,v 1.4 1997-12-15 23:38:10 brian Exp $ -->
 <!-- The FreeBSD Documentation Project -->
 
   <sect>
@@ -522,6 +522,52 @@ default            10.0.0.2           UGSc        0        0      tun0
         <p>Here, we get our CONNECT, send nothing, then expect a line-feed,
         forcing <bf/ppp/ to read the whole CONNECT response.
 
+      <sect2>
+        <heading>Ppp ignores the `\' character in my chat script</heading>
+
+        <p>Ppp parses each line in your config files so that it can
+        interpret strings such as <tt/set phone "123 456 789"/ correctly
+        (and realize that the number is actually only <bf/one/ argument.
+        In order to specify a ``"'' character, you must escape it using
+        a backslash (``\'').
+
+        <p>When the chat interpreter parses each argument, it re-interprets
+        the argument in order to find any special escape sequences such
+        as ``\P'' or ``\T'' (see the man page).  As a result of this
+        double-parsing, you must remember to use the correct number of
+        escapes.
+
+        <p>If you wish to actually send a ``\'' character to (say) your
+        modem, you'd need something like:
+
+        <verb>
+          set dial "\"\" ATZ OK-ATZ-OK AT\\\\X OK"
+        </verb>
+
+        <p>resulting in the following sequence:
+
+        <verb>
+          ATZ
+          OK
+          AT\X
+          OK
+        </verb>
+
+        <p>or
+
+        <verb>
+          set phone 1234567
+          set dial "\"\" ATZ OK ATDT\\T"
+        </verb>
+
+        <p>resulting in the following sequence:
+
+        <verb>
+          ATZ
+          OK
+          ATDT1234567
+        </verb>
+
       <sect2>
         <heading>None of this helps - I'm desperate !</heading>