Synchronization signals wander level monitoring within digital telecommunication networks for ITU-T G.823 compliance testing

In collaboration with IST company we started project for synchronization signals wander level monitoring within digital telecommunication networks for ITU-T G.823 compliance testing.

The general approach to the wander level monitoring is the next. The WMS-8 system consists of the WMS-8 server (hardware and software), probe units, installed directly at the sites where the monitoring is necessary, and the WMS-8 client software. WMS-8 server and probe units should be connected to the same IP-network (typically to the corporative Ethernet LAN). Standard PCs with the WMS-8 client installed at should be connected to the server through the same or other LAN.

The monitored signal's TIE (defined in ITU-T G.810) data is continuously measured and saved in the system database. The default TIE sampling interval is 1 s. The WMS-8 server calculates MTIE and TDEV for each monitored object every pre-set time period (1 min by default), using the TIE data massive for the last measurement interval (10 000 s by default). When calculated, the MTIE and TDEV values are compared with the pre-selected G.823 or customer masks. This calculation and comparison is called in the WMS-8 system as a background wander monitoring. The background monitoring mode starts automatically after the server turns on and is considered as the main WMS-8 mode of operation.