82 IDAS OPERATIONIDAS operation■The transceiver provides Icom Digital Advanced System(IDAS) that meets the 6.25 kHz emission mask requirementsfor narrow banding, and increases efficiency of channel al-location and use of spectrum using the NXDN common airinterface.IDAS Conventional operationDThe IDAS Conventional system enables efficient conventionaloperation in the digital mode.Push [Zone], then push [CH Up] or [CH Down] to select the➥conventional zone.Multi-site conventional operationDThe Multi-site Conventional system can support up to 16sites (each site has one repeater) through an IP network, andenables efficient conventional operation in the digital mode.Push [Zone], then push [CH Up] or [CH Down] to select the➥Multi-site conventional zone.Single-site Trunking operationDThe Single-site Trunking system enables further effectivechannel management by sharing a minimum number of chan-nels with a large number of users.Push [Zone], then push [CH Up] or [CH Down] to select a➥Single-site Trunk zone.Multi-site Trunking operationDThe Multi-site Trunking system can support up to 48 trunkedsites through an IP network. This enables the users to com-municate with stations through the interlinked trunked site.Each site can have up to 30 repeaters.Push [Zone], then push [CH Up] or [CH Down] to select the➥Multi-site Trunk zone.NOTE: During the Single-site or Multi-site Trunking opera-tion, you can receive and transmit digital calls in the sameway as in the conventional mode.