OM Series IP Telephony System Administrator Manualwww.newrocktech.com 5-15 Multi-site Telephony NetworkDevices installed in one or multiple sites can be interconnected for the following purposes: Expanding the capacity of the facility; Making direct and free inter-site calling and making outbound call to PSTN via trunks on otherdevices.5.1 Multi-site Network with Simple Dialing SchemeIn this simple form of multi-site network, inter-site calls are made by dialing the called party’s extensionwithout extra prefix digits. The dialing plan of this scheme is simple and straightforward, and therefore, itis suitable to applications in which multiple devices are stacked to expand the port capacity , and it is alsosuitable to form a private network of headquarter and its branch offices. The multi-site network withsimple form requires a carefully designed numbering plan for each device to avoid potential numberconflicts.The configuration of multi-site network with simple form includes the configurations of the device on themanaging site and the devices on regular sites. The device list of the multi-site network is maintained bythe device on the managing site, which distributes the device list to the devices on the regular sites,illustrated as below.The configuration on the managing siteStep1 Select multi-site network formGo to the Multi-site page and select Simple as the scenario. See Figure 5-1.Figure 5-1 Multi-site scenariosStep2 Enable auto discovery of devices