Users Manual

SME VOIP SYSTEM GUIDE 1.1 63 | P a g e
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5.13 LAN SYNC
Apart from the DECT Over-the-air solution, the LAN SYNC provides an alternative option for base synchronization. The
reason thereof is to allow a larger coverage of installations where the bases cannot see each other. This means that
the LAN sync feature, specified by the IEEE1588 standard, will handle the synchronization over the network, instead of
Over-the-Air.
NOTE: To join 2 or more Base stations in a Multi Cell system you need to have one handset added to the system. For
details and Step-by-Step guide to Multi Cell setup, please see Appendix.
In this section, we describe the other parameters available in the Multi-cell environment, namely the LAN SYNC menu.
However, before stepping into the configuration details, the user must consider the following network requirements
in order to minimize the impact from other devices on the network:
 A Maximum number of 3 cascaded Ethernet switches are supported between the Sync Master (SM) and a
Sync Slave (SS) base stations.
 Only switches, which fulfill the requirements regarding Ethernet synchronization according to IEEE1588, are
recommended and officially supported.
 All base stations must be connected to a dedicated DECT VLAN.
 The DECT VLAN must be configured to the highest priority in all switches that is connected to the DECT
infrastructure.
 The backbone network load should not exceed 50 percent of the total link capacity.
 The Ethernet switch must be able to use DSCP as QoS parameter.
 The network must support multicast datagrams from IEEE1588.
Good network topology Bad network topology
LAN sync feature
The initial port of the page provides the option to enable / disable the feature for the device