The IP Office system support SIP extensions on its LAN1 and/or LAN2 interfaces. For phone's being supported using auto-generated files, these values are included in the auto-generated settings file downloaded by the phones when they restart.
Before you begin
Note that changing the SIP registrar settings of an IP Office system requires the IP Office system to be rebooted.
Using either IP Office Manager or IP Office Web Manager in offline mode, load the system configuration.