talk about plugins in README

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+***************************************
 Auerswald Callnotifier for COMpact 3000
 ***************************************
 
@@ -5,22 +6,119 @@ Connects to the debug port of your Auerswald Compact 3000 telephony switchboard
 and listens for incoming calls.
 It will notify you whenever a call comes in.
 
+It also listens for outgoing calls if you want that, and you can log
+incoming and/or outgoing calls into a file or a database.
+
+Callnotifier is able to resolve the names of calls via LDAP and the
+caller location city names via OpenGeoDb.
+
+.. contents::
+
+=============
+Configuration
+=============
+Copy ``data/callnotifier.config.php.dist`` to ``data/callnotifier.config.php``
+(same name, just no ``.dist``), open it in a text editor and adjust it to
+your needs.
+
+It contains examples for every plugin.
+Adjust them as you need and remove the ones you do not need.
+
+
+
+Call types
+==========
+Logging plugins allow you to specify when calls shall be logged:
+
+- ``startingCall`` - when the call is coming in, and the telephone rings
+- ``finishedCall`` - when the call has ended
+
+Furthermore you may decide which calls to log:
+
+- ``i`` - Log incoming calls only
+- ``o`` - Log outgoing calls only
+- ``io`` - Log both incoming and outgoing calls
+
+
+=======
+Plugins
+=======
+There are two types of plugins: Detailler and Logger.
+Detaillers load additional details to a call - e.g. a name - and loggers
+can do anything, e.g. write a log file or send a XMPP message.
+
+Detailler
+=========
+Plugins that fetch additional details to calls are named "detailler".
+
+CallMonitor_Detailler_LDAP
+--------------------------
+The plugin determines the name for a telephone number by looking up a
+LDAP directory.
 
+It retrieves the name of the caller for incoming calls, and the name
+of the telephonee for outgoing calls.
+
+It searches the following LDAP attributes:
+
+- ``companyPhone``
+- ``homePhone``
+- ``mobile``
+- ``otherPhone``
+- ``telephoneNumber``
+
+Example configuration::
+
+    $callMonitor->addDetailler(
+        new CallMonitor_Detailler_LDAP(
+            array(
+                'host' => 'ldap.home.cweiske.de',
+                'basedn' => 'ou=adressbuch,dc=cweiske,dc=de',
+                'binddn' => 'cn=readonly,ou=users,dc=cweiske,dc=de',
+                'bindpw' => 'readonly'
+            )
+        )
+    );
+
+
+CallMonitor_Detailler_OpenGeoDb
+-------------------------------
+The plugin determines the location (city) for a telephone number by
+checking the area code (prefix number) against a OpenGeoDB SQL database.
+
+If several locations share the same area code, the one with the most inhabitants
+is used.
+
+If you use this plugin, you need to run ``docs/opengeodb-create-my_orte.sql``
+on the OpenGeoDB database to create an indexed table with all relevant
+information needed by the plugin.
+
+Example configuration::
+
+    $callMonitor->addDetailler(
+        new CallMonitor_Detailler_OpenGeoDb(
+            'mysql:host=dojo;dbname=opengeodb',
+            'opengeodb-read',
+            'opengeodb'
+        )
+    );
+
+
+====
 TODO
 ====
 - multiple notification methods: XMPP, dreambox, notify-send
-- ldap name resolution
-- write a call list (who, when, how long)
-- filter/exclude by local target
 
 
-Issues
-======
+============
+Known issues
+============
 Ctrl+C does not send the disconnect command.
 This is a problem with PHP since pcntl_signal handling and blocking sockets
 do not work together. The signal will not be handled.
 
 
+======
 Source
 ======
 Original git website: http://git.cweiske.de/?p=auerswald-callnotifier.git