wrusers.md

@@ -337,10 +337,18 @@ Transfer](https://www.ohwr.org/project/cngs-time-transfer/wiki)
     GmbH](https://www.gsi.de), Germany
       - [General Machine Timing System at
         FAIR](https://www-acc.gsi.de/wikis/Timing/WebHome)
-          - Requires a few thousand receiver nodes
-          - [*White Rabbit Technology as Basis for the FAIR Timing
-            System*](https://www-acc.gsi.de/wikis/pub/Timing/TimingSystemDocuments/PHN-ACC-RD-45.pdf),
-            D. Beck et al, 2011
+      - The primary tasks of the timing system are the following: 
+          - Time-Synchronization of ~2000 - 3000 nodes with sub-ns
+            accuracy over fiber lengths of up to 2 km. 
+          - Distribution of TAI counters with ns accuracy. 
+          - Generation of timing events for synchronization of
+            equipment. 
+          - Provide infrastructure for common services of the
+            accelerator (Post Mortem, Interlock,...) and FAIR
+            experiments (time stamps, ...). 
+      - [*White Rabbit Technology as Basis for the FAIR Timing
+        System*](https://www-acc.gsi.de/wikis/pub/Timing/TimingSystemDocuments/PHN-ACC-RD-45.pdf),
+        D. Beck et al, 2011
       - [Timing System
         Documents](https://www-acc.gsi.de/wikis/Timing/TimingSystemDocuments)
         (papers, technical documents)
@@ -933,5 +941,5 @@ Experience is excellent (\!\!). (DESY, 28/10/13)
 
 -----
 
-27 March 2018
+20 April 2018