Using Your Phone595. Mark the desired radio box in the Intercom Barge field.6. Click Save changes to accept the change.7. Perform auto provisioning on the phone to download above configurations. Formore information on how to perform auto provisioning, refer to DownloadingConfiguration Files on page 7.To place an intercom call when push-to-talk mode is disabled:1. Short press the Intercom/PTT key when the phone is idle.The called destination plays a warning tone and automatically answers the call inthe speakerphone mode by default.2. To end the intercom call, press the Intercom/PTT key again or the EndCall soft key.To place a push-to-talk call when push-to-talk mode is enabled:1. Long press the Intercom/PTT key for 1.5 seconds when the phone is idle.The called destination plays a warning tone and automatically answers the call inthe speakerphone mode by default.2. Keep pressing the Intercom/PTT key during the push-to-talk call.3. To end the push-to-talk call, release the Intercom/PTT key.You can use multicast paging to quickly and easily broadcast time sensitiveannouncements to users who are listening to a specific multicast group. You canconfigure a multicast paging key or the paging list key on the phone, which allows youto send a Real Time Transport Protocol (RTP) stream to the pre-configured multicastaddress(es) without involving SIP signaling. You can configure the phone to receive anRTP stream from pre-configured multicast listening address(es) without involving SIPsignaling. You can specify up to 10 multicast listening addresses.