Every 2N® IP Intercom can receive and send one multicast stream by default with the basic license. If you want to receive (or send) more multicast streams (on up to 5 different multicast IP addresses or ports) then you need Enhanced integration license or Gold license which enables you to configure this feature via Automation. It is very useful if you have for example a building with 2 separated floors – intercoms on the 1st floor are listening on multicast IP address 184.108.40.206 and port 10 000 (represented by 2N® IP Video Kit in the example below), then intercoms on the 2nd floor are listening on 220.127.116.11 and port 10 000 (represented by 2N® IP Safety). So once you press a button on any of these intercoms on the 1st floor you will make announcement to all other intercoms on the 1st floor. The same will be once you press a button on any of the intercoms on the 2nd floor – you will speak to all other intercoms on the 2nd floor. Once you finish your announcement you will press a button again and multicast streaming will be ended (channel will be stopped). But let´s imagine that you also need a few intercoms which will be able to make announcement to the 1st floor as well as to the 2nd floor and also receive announcement from both these floors. For this option you will need an intercom with two buttons at least (or with keypad).
As mentioned previously all intercoms should be able to send multicast traffic once the quick dial button is pressed and also receive multicast if any other intercom is transmitting. Therefore we will set two functions in the section "Services – Automation" for each intercom.
Send multicast: once you press a specific quick dial button on any of intercoms from the 1st floor (it will be 2N® IP Video Kit in our example) then you´ll start to talk to all other intercoms on this floor. Complete configuration of “Function 1” is shown in the picture below – when the first quick dial button is pressed for the first time, condition on the 2nd row is met and it will trigger actions on the 4th and 5th rows, i.e. 2N® IP Video Kit sends specific multicast request (command=group01) to all other intercoms and starts sending multicast traffic. Based on the request these intercoms open multicast channel and are able to receive multicast traffic (on IP address 18.104.22.168 and port 10 000). Once you finish your announcement then you have to press the first quick dial button again and stop multicast sending. In this case 2N® IP Video Kit sends another multicast command to all other intercoms (command=stopgroup01) and stops sending multicast stream.
Note: sometimes it is also very useful to check somehow if the first quick dial was pressed for the first time (begin multicast session) or for the second time (finish multicast session). This indication can be configured with some of our intercoms – you can use LED diode or a button of 2N® IP Safety which is still shinning (idle time – no multicast stream initiated from this intercom) and once you press a button for the first time (begin multicast session) then this LED or button starts blinking (example below – 250ms shinning and 250ms off).
Receive multicast: all other intercoms on the 1st floor have to be configured that once they receive specific multicast request (group01 in our example) then they will activate a channel and start listen on specific multicast IP address and port. After that, once the announcement from the selected intercom is finished then another multicast request is received (stopgroup01) and multicast channel is closed.
Configuration of intercoms on the 2nd floor will be almost the same as shown previously (1st floor) but in this case all intercoms send (and listen) multicast stream to IP address 22.214.171.124 and port 10 000. Also multicast request which activates / deactivates the channel was changed to "group02" for activation and to "stopgroup02" for deactivation.
Configuration of these selected intercoms which can send multicast traffic to the 1st floor as well as to the 2nd floor is a combination of two previous configurations. But keep in mind that these intercoms need to have at least 2 quick dial buttons (or keypad). In this case you have to configure three functions in the Automation section. Function 1 is absolutely the same as shown for 2N® IP Video Kit (1st floor intercom), Function 2 is the same as for 2N® IP Safety (2nd floor intercom) and Function 3 ensures that you can receive multicast from 1st floor intercoms as well as from the 2nd floor intercoms.
Send multicast: Automation you can download here: Send_To 1st floor.am
Automation you can download here: Send_To 2nd floor.am
Receive multicast from different floors: Automation you can download here: Receive from 1st + 2nd.am
Note: All commands used in the Automation section are deeply described in our 2N® IP Intercom Automation manual where are also some examples. This manual is available on our web pages: