This will not work for mission-critical users, who need the ability to cross-network PTT with something better than the ‘best effort’ service that is standard for commercial networks.Įqually serious is the inability of carrier-based PTToC to support Direct Mode communication, which is direct radio-to-radio (also called ‘simplex’) communication without involving a network. Just as it is business for them to restrict the offer of PTToC to a limited range of smartphones. It’s business and their proprietary product. Even when two carrier integrations are technically compatible, Company A may not permit its subscribers to use its PTToC to connect to subscribers on another company’s network. The technical incompatibility of the two PTToC carrier integrations makes cross-network connection impossible.Ĭommercial barriers also exist. Engineering reasons can prevent the connection of PTToC from Company A’s carrier to talk groups on Company B’s network and vice versa. The integration of a carrier-based PTToC offering is challenging both technically and commercially. Thanks to its tight network integration, this form of PTToC is fast, runs standard call types, and (maybe with an additional service) can handle a saturated network.īut there is a downside as well. And instead of owning a comms system, organization can purchase subscriptions and maintenance contracts from a commercial provider. It runs on standard smartphones, which are a lot less expensive than public safety grade radios. Non-mission-critical users, as well as some public safety agencies, have taken up carrier-based PTToC as an alternative to LMR. Mission-Critical PTT (MCPTT) – which is the name of a 3GPP initiative based on the Open Mobile Alliance’s OMA-POC technology to define a mission-critical open standard for PTT over LTE. EsChat, Harris BeON, Tait TeamPTT, Motorola WAVE) over the top of a network and is thus independent of any carrier network. Over-the-Top (OTT PTToC) products – each of which run as a mission-critical application (e.g. AT&T, Kodiak, Verizon and Sprint) and tightly integrated with their networks. Three classes of PTToC exist, two being types of commercial product and one being an open standard.Ĭarrier-based PTToC services – offered by mobile network operators (e.g. LTE has the data rates and speed to do this, but is PTToC really mission-critical?
Already PTToC over LTE is being used to replace LMR in non-mission-critical scenarios. PTT, you will remember, is a must-have feature for critical communications. Push-to-Talk Over Cellular (PTToC) tries to emulate the behavior of LMR’s PTT over cellular networks and commercial versions have been around since the days of Nextel’s iDEN. Public Safety embraced LMR for its ability to provide speedy and reliable narrowband voice communications at the touch of a PTT button.
0 kommentar(er)
