隨著 Iridium NEXT 衛星星座升級即將完成，Iridium 網路持續為市場提供最佳、最可靠的覆蓋。對於 Iridium Push-To-Talk (PTT) 服務而言，這代表客戶能將群組通信的範圍推展到其他任何網路無法比擬的程度。Iridium PTT 已以其強大功能廣為人知：其快速、可靠的連線能力，早在 2016 年便獲得行動衛星用戶協會 (Mobile Satellite Users Association) 所頒發的「最佳緊急應變創新獎 (Top Emergency Response Innovation Award)」。如今，隨著網路強化與重大服務更新，Iridium PTT 比以往更強大、更快速、也更可靠。
Iridium PTT 服務的改進：
全新網路：Iridium NEXT 是太空史上最大規模的「技術更新 (tech refresh)」。透過以更高性能的衛星取代原有的 75 顆衛星，Iridium 提升了整體效能與連接能力。
更高容量：Iridium NEXT 衛星具有更高的容量，能提供更多頻道給包括 PTT 在內的所有服務。在高頻繁使用的地區，這大幅降低了掉話或通話消退的風險。
更快的通話連線：Iridium NEXT 提供更高的星間鏈路與地面傳輸能力，支援顯著更高的流量負載，並提升通話連線速度。
改善的語音品質：用戶回報顯示，Iridium NEXT 星座讓語音數據包的處理與傳輸更穩定，減少語音含糊或失真的問題，並顯著提升 PTT 的通話品質。
韌體升級：Iridium 致力於 PTT 的主要韌體與服務改進，進一步降低通話中斷率，並提升可靠性，為使用者帶來更強大的通信生命線。
更長的 PTT 通話時間：自 2018 年 9 月起，韌體更新將允許客戶在 PTT 對講中持續發言的時間，從 20 秒延長至 40 秒。這讓客戶通話時間更充裕，能夠在全球任何地點享有清晰、可靠的通信。
方便的群組與覆蓋範圍管理：
Iridium PTT 用戶可透過 Iridium PTT Command Center —— 一個使用者友好的線上工具，輕鬆配置對講群組與覆蓋區域。群組可即時調整，並能選擇讓不同群組互通，以便於跨群組協調。
截至目前，已有 8 次 Iridium NEXT 發射中的 7 次成功完成，大部分的網路流量已透過新衛星承載。Iridium 已於 2018 年底完成整個 NEXT 星座部署，為使用者帶來更強韌的連線與更可靠的服務。透過這次星座升級，Iridium 的服務以及產品線將不斷演進。未來，Iridium 也將持續創新，協助客戶在無需依靠地面基礎設施的情況下，也能實現可靠的協調通信。
With the Iridium NEXT satellite constellation upgrade almost complete, the Iridium network continuesto provide the best, most reliable coverage on the market. For Iridium Push-To-Talk (PTT), this meanscustomers can push group communications beyond what any other network is able to offer. Iridium PTTalready has a strong reputation for its functionality: its rapid and reliable connectivity earned it the TopEmergency Response Innovation Award from the Mobile Satellite Users Association back in 2016. Nowwith an improved network and major service updates, Iridium PTT services have grown stronger, faster,and more reliable than ever before.Here’s a look at how Iridium PTT service has improved:1. New Network: Iridium NEXT is the largest ‘tech refresh’ in space history. By replacing its existing75 satellites with more capable ones, Iridium is improving its overall performance and connectivityfor its customers.2. Higher Capacity: The Iridium NEXT satellites have higher capacity and therefore more channelsare available for all services, including PTT. In areas of high congestion, this significantly reducesthe risk of issues such as call-drop or call-fade.3. Faster Call Connections: Iridium NEXT provides increased crosslink and feederlink capacity whichsupports significantly higher traffic loads and improves call connectivity speeds.4. Improved Voice Quality: Reports from end users have confirmed that the Iridium NEXT constellationresults in more consistent processing and transport of voice packets. This minimizes issuesassociated with slurring and distortion and improves the voice quality of the Iridium PTT service.5. Firmware Upgrades: Iridium has worked on major firmware and service improvements for PTT,resulting in fewer dropped sessions and improved call reliability. These upgrades give you an evenstronger lifeline than before.Longer PTT Sessions: In September 2018, we will introduce a firmware update which will increasethe amount of time a customer can have the floor on a PTT session from 20 to 40 seconds. Thismeans that customers can talk longer, benefiting from clear and reliable communications regardlessof where they are in the world.Iridium PTT customers can easily configure their talkgroups and coverage areas through the IridiumPTT Command Center, a user-friendly online tool. Talkgroups are easily adjustable on the fly, andusers have the option to make different talkgroups interoperable for when they need to coordinatewith another group.With seven out of eight Iridium NEXT launches complete, much of our network traffic is already beingcarried by our new satellites. Iridium plans to have the Iridium NEXT constellation complete by the endof 2018, bringing even stronger connections and even more reliable services than before. Throughour constellation upgrade, our services continue to evolve, and our lines of products continue to grow.Iridium will continue to innovate to allow customers to coordinate reliably without depending onnearby ground infrastructure. Learn more about the capabilities of Iridium PTT products and services at www.Iridium.com/PTT.