2.3 Synchronisation

Upon connection to a public or private ISDN network, remember to configure one port for synchronisation at least. The PBX works in two modes at the same time: as a source of synchronisation (Master) and a device that receives synchronisation (Slave). There are two fields in the HW – Synchronisation menu. The left-hand one contains all digital virtual ports that can be selected for synchronisation, i.e. all PRI and BRI virtual ports in the TE mode. The other field contains a list of virtual ports that have been selected for synchronisation. All ports in the NT mode can be used as synchronisation sources.

Figure: View of Synchronisation Port Assigning and Priorities

Use the Up and Down buttons to move the selected synchronisation up or down for a higher or lower synchronisation priority respectively – the port listed first has the highest priority (255). Every other carrier has a priority lower by 1 (254, 253, ..). A newly assigned carrier is always placed last (the lowest priority). In the case of synchronisation loss, the following port in the list (with a lower priority) is selected automatically. Upon synchronisation restoration, the PBX returns automatically to the port with the highest priority.

Push the Right and Left buttons to transfer the virtual ports from one field to another and thus ensure the PBX synchronisation.