* Maintain the same meaning of DESTDIR and INSTALL_PREFIX as in main

  Makefile
* Document ppp support to the best of my knowledge.
* Err clearly if the VERSION was not found.
* Add some basic/broken detection of ppp in autoconf.

Merged revisions 2987 via svnmerge from 
https://origsvn.digium.com/svn/zaptel/branches/1.2


git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.4@2990 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 21 insertions, 2 deletions

diff --git a/README b/README
index 23b6ce5..dfff136 100644
--- a/README
+++ b/README
@@ -385,6 +385,26 @@ see an extra '(In use)':
 
            2 XPP_FXS/0/0/1 FXOLS (In use)
 
+[[ppp]]
+PPP Support
+-----------
+Zaptel digital cards can provide data channels through ppp as
+point-to-point connections. This requires a plugin to the ppp daemon
+that is included in the ppp/ subdirectory. To install it:
+
+1. Make sure you have the PPP source / headers installed. On Debian:
+
+   apt-get install ppp-dev
+
+2. Run 'make' on the ppp subdirectory:
+
+   make -C ppp 
+   make -C ppp install
+
+3. Make sure your kernel has support for both PPP (which is common is
+   distribution kernels and for HDLC (much less common) - CONFIG_PPP and
+   CONFIG_HDLC .
+
 
 What is the license for the zaptel driver?
 ------------------------------------------
@@ -394,8 +414,7 @@ The GNU GPL is included in the file LICENSE in this directory.
 
 If you wish to use the zaptel drivers in an application for which the 
 GPL is not appropriate (e.g. a proprietary embedded system), licenses
-under more flexible terms can be readily obtained through Digium, Inc. 
-at reasonable cost.
+under more flexible terms can be readily obtained through Digium, Inc.at reasonable cost.
 
 
 How do I report bugs or contribute?