So far, I have not been able to obtain enough information to determine if the one-to-many feature can be used for a district broadcast. The only remaining question is when, exactly, will eMBS become available to public-safety agencies using FirstNet?ĮMBS adds this one-to-many capability to FirstNet. Regardless, multicast will become yet another valuable tool and a welcome addition to the FirstNet network. If it can be sent to specific cell sites, it could also be used to broadcast and stream video to an entire stadium full of people and this might result in a reduction of the data capacity needed during a sporting event or concert. Once I have information on exactly how multicast can be sliced and diced, I will include it in a future Advocate. No matter, that multicast is finally available on FirstNet is very good news for first responders. If so, would the message have to be sent to specific cell sites, or will it be sent nationwide? I suspect it will be possible to use one-to-many in different areas including districts, citywide, countywide, and perhaps statewide, but so far, I have not been able to verify that eMBS will be this flexible. This is not multicasting.ĮMBS adds this one-to-many capability to FirstNet. Text messages can be sent to multiple recipients but each text message is sent sequentially to each person. Meanwhile, the majority of the traffic on cellular systems has been one-to-one because this is what these networks were designed for. From its beginning, LMR has been able to reach groups or an entire city with a single broadcast. Most metro areas have additional LMR channels for citywide communications. In major metro areas where a city is divided into districts, each district might be on its own LMR channel or, in a trunked system, the district will have a group that is set up to include everyone within that district. Police, fire, and EMS units and personnel can be dispatched simultaneously with a single transmission from the Emergency Communications Center (ECC) or dispatch center using LMR. Those of us who “grew up” with LMR have taken one-to-many communications for granted. Multicast, or eMBS, is important because it not only supports one-to-many broadcasts over the network, it adds yet another attribute which, until now, only Land Mobile Radio (LMR) could provide. The most significant effect I see with multicasting videos is that this activity consumes much more bandwidth than PTT. This network enhancement makes it possible to send Push-To-Talk (PTT) voice, data, and video to multiple devices simultaneously (multicasting). One of these tools is actually an upgrade to the network that many of us have been expecting for a long time. HANDSET represents the handset name, X represents theĭestination handset number) for a few seconds.At IWCE 2022, FirstNet announced a new, significant upgrade to FirstNet (Built with AT&T) that prompted me to write about communications tools for first responders. Then use the dialing keys to enter the destination handset number. If you have more than 2 handsets, press PUSH TO TAL�. If you have a 2-handset system, press and hold PUSH TO TAL�. There are a few ways to begin a PTT call to a single NOTE: The handset screen displays No Incoming PTT when PTT is turned off. PUSH TO TAL� when the handset is not in use. When you attempt to place a PTT call to another handset which is accessing the answering system or on an intercom call or outside call, your handset screen shows While PTT is in use between 2 handsets, other handsets cannot use the intercom feature but can access the answering system. Only one PTT session can be active at a time. PUSH TO TAL�, so the other person can respond. Any handset you call can respond by pressing the PUSH TO TAL� key to begin 2-way communication. You can directly broadcast messages to the speakerphone of any handset.
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