Mountain Connect 2019 Off-Network Communications Challenges and Solutions for Broadband Systems Thursday, June 25th, 2019 Robert Escalle Vice President, Public Safety Market Segment

Recent timeline of standards being released is below. MCPTX solutions and standards continue to evolve quickly in the 3GPP process and have become foundational for public safety. Recent timeline of standards being released is below. Release 13 Mission Critical Push to Talk (MCPTT) completed in March 2016 Release 14 Mission Critical Push to Talk Improvements completed September 2017 Mission Critical Data completed September 2017 Mission Critical Video completed September 2017 Release 15 and beyond Mission Critical Push to Talk Improvements Completed June 2018 Mission Critical Data Completed June 2018 Mission Critical Video completed June 2018 Future Railways Modern Communications System (FRMCS) study ongoing in SA6, normative work completed June 2018 Interconnection between systems study completed, normative work completion June 2018 Interworking with legacy systems study completed, normative work completed June 2018 Maritime communications study ongoing in SA1 Future Railways Modern Communications System Phase 2 (FRMCS2) study and normative work ongoing in SA1 MBMS APIs for MC Services study ongoing in SA6 

Disadvantages of ProSe: Off-Network Communications: What are some of the challenges of ProSe – Proximity Services for D2D or Push-to-Talk Communications Disadvantages of ProSe: Low power - ~250mW Broadcast or one-to-many is still being developed and optimized Limited range of D2D coverage due to power restraints Interoperability between current narrowband assets like P25, TETRA, and DMR Interoperability between different chipset technologies Advantages of ProSe: Auto-Discovery of other UEs Ability to re-use existing technology (LTE) being used by core device Centralized management of UEs with ProSe enabled UE relay for UEs not able to connect or in coverage of network Ability to seamlessly sustain both off and on-network capabilities Both UEs have network coverage Only one UE has network coverage No network coverage

RDK-2 PRODUCT OVERVIEW Challenges of ProSe for Off-Network Communications .. Original ideas around Proximity Services 9 Discovery Communications Advertisement “Jaws 9 is now playing at the Cinemark Movie Theater at Shops at Belkin” “I want to see Jaws 9 either Saturday or Sunday of this week with any available specials” “Here are the showtimes for Jaws 9 at the Cinemark at Shops at Belkin” Click here X for 15% off concessions SAT 3PM, 5PM, 7:30PM SUN 3PM, 6PM, 8:45PM

Off-network communication that keeps you connected. XPand Direct Mode Works simultaneously with handset features and functions Works while On or Off the Carrier Network, providing an additional communication method Uses Sonim’s innovative XPand Connector to draw power from the phone’s extra-large battery Allows for 1:1 and group PTT calls and text messages Innovative, and optional, call recording and playback Frequency hopping to mitigate channel interface 256-bit AES symmetric key encryption keeps messages secure and between the users

SLED – Sonim LMR Enhanced Detachable. Confidential / 6 SLED – Sonim LMR Enhanced Detachable. Full-featured P25 conventional and trunking SLED for Sonim XP8. Supports half duplex operation. LMR P25 Bands 700/800 – Tx 762 - 870 MHz 700/800 – Rx 762-776 MHz / 851-870 MHz LMR P25 Features Supports both conventional and P25 trunking Up to 2.5W RF output power Works off of XP8 battery Full featured P25 capabilities Direct mode supported MDC1200 signaling supported

RDK-2 COMPONENT- GLIMPSE UNDER THE HOOD RDK-2 Rapid Deployment Kit Connected directly to FirstNet or via Wi-Fi AP Sonim XP8 x4 PoE Switch PoE Devices LAN BGAN Explorer710 PoE1 PoE2 PoE3 PoE4 WAN Wi-Fi AP or Client GPS RUN CELL SAT AC/DC Charging BT Enabled Battery Monitor CP IBR900-1200 IBR900 Modem Indicators

RDK-2 COMPONENT- GLIMPSE UNDER THE HOOD RDK-3 Rapid Deployment Kit Connected directly to FirstNet or via Wi-Fi AP Sonim XP8 x4 PoE Switch JPS RSP-Z2 Dual Channel LAN PoE Devices BGAN Explorer710 P25 Radios PoE1 PoE2 PoE3 PoE4 WAN Wi-Fi AP or Client GPS RUN CELL SAT BT Enabled Battery Monitor AC/DC Charging CP IBR900-1200 IBR900 Modem Indicators

RDK-2 PRODUCT OVERVIEW RDK units with MESH networking Cellular Network MESH 2.5mi Cellular Network MESH 1.5mi

Thank You Robert Escalle VP Public Safety r.escalle@sonimtech.com