Each device is configured to transmit to and receive from this address. Table 1
provides the default value for this address 'ipBroadcastGroup', along with the 'ipBasePort' (Group Broadcast port) that is required to be available on each device. These values may be modified from their default values as described in Android Configuration File Settings
section, but each device in the group must be configured with the same values for the parameters. The PTT Express client Private Response communication utilizes SIP (Session Initiation Protocol) for call signaling and sends audio packets via unicast transmissions between the devices in the Private Response. The ‘sipLocalPort’ (SIP Private Response port) must be the same value on all devices.